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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Identification

Chemical structure
Display Name:
2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
EC Number:
228-768-4
EC Name:
2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
CAS Number:
6358-31-2
Molecular formula:
C18H18N4O6
IUPAC Name:
2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

Type of Substance

Composition:
mono-constituent substance
Origin:
organic

Substance Identifiers open all close all

  • 6358-31-2
  • 11741
  • C.I. Pigment Yellow 74
  • Butanamide, 2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3- oxo- (9CI)
  • C. I. Pigment Yellow 74
  • C.I. 11741
  • C.I. Pigment Yellow 74
  • C.I. Pigment Yellow 74 (8CI)
  • Irgalite Yellow L 1252 HD
  • Irgalite Yellow L 1254 HD
  • PY. 74
  • Pigment Yellow 74
  • SEIKAFAST YELLOW 2054
  • SYMULER Fast Yellow
  • Sico Yellow 1252
  • Sico Yellow FR 1252
  • Sico Yellow L 1252
  • Sudafast Yellow 125

    • Compositions

    Boundary Composition(s) open all close all

    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Shape:
    polyhedral
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    elongated
    Shape:
    rod
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    cubic
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D90
    Range:
    > 0.04 - < 0.2 μm
    Percentile:
    D50
    Range:
    > 0.02 - < 0.1 μm
    Percentile:
    D10
    Range:
    > 0.01 - < 0.065 μm
    Range of length:
    >= 0.07 - <= 0.8 μm
    Range of aspect ratio (:1):
    >= 3 - <= 8
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D90
    Range:
    > 0.04 - < 0.2 μm
    Percentile:
    D50
    Range:
    > 0.02 - < 0.1 μm
    Percentile:
    D10
    Range:
    > 0.01 - < 0.065 μm
    Additional information:
    The determined particle size distribution relates to both shape categories. The smallest dimension of all particles had been considered.

    ASSEMBLY STRUCTURE: homogeneous and solid particles.

    RIGIDITY: not required/appropriate.
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C.I. Pigment Yellow 74
    Pure structure:
    yes

    Specific surface area

    Range of specific surface area:
    >= 5 - <= 125 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Shape:
    polyhedral
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    cubic
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    elongated
    Shape:
    rod
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Range:
    > 0.01 - < 0.065 μm
    Percentile:
    D50
    Range:
    > 0.02 - < 0.1 μm
    Percentile:
    D90
    Range:
    > 0.04 - < 0.2 μm
    Additional information:
    The particle size distribution relates to all shape categories
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D10
    Range:
    > 0.01 - < 0.065 μm
    Percentile:
    D50
    Range:
    > 0.02 - < 0.1 μm
    Percentile:
    D90
    Range:
    > 0.04 - < 0.2 μm
    Range of length:
    >= 0.07 - <= 0.8 μm
    Range of aspect ratio (:1):
    >= 3 - <= 8
    Additional information:
    The particle size distribution relates to all shape categories
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C.I. Pigment Yellow 74
    Pure structure:
    yes

    Specific surface area

    Range of specific surface area:
    >= 5 - <= 125 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no

    Legal Entity Composition(s) open all close all

    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    elongated
    Remarks:
    multimodal shapes containing abot 99% spheroidal particles and about 1% elongated particles
    Shape:
    rod
    Pure shape:
    no
    Typical composition:
    ca. 1 %
    Range:
    > 0 - < 10 %
    Shape category:
    spheroidal
    Remarks:
    multimodal shapes containing about 99% spheroidal particles and about 1% elongated particles
    Shape:
    spherical
    Pure shape:
    no
    Typical composition:
    ca. 25 %
    Range:
    > 5 - < 60 %
    Shape category:
    spheroidal
    Remarks:
    multimodal shapes containing about 99% spheroidal particles and about 1% elongated particles
    Shape:
    cubic
    Pure shape:
    no
    Typical composition:
    ca. 74 %
    Range:
    > 40 - < 95 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D90
    Typical value:
    ca. 0.1 μm
    Range:
    > 0.075 - < 0.125 μm
    Percentile:
    D50
    Typical value:
    ca. 0.065 μm
    Range:
    > 0.04 - < 0.09 μm
    Percentile:
    D10
    Typical value:
    ca. 0.044 μm
    Range:
    > 0.02 - < 0.065 μm
    Range of length:
    > 0.175 - < 0.675 μm
    Typical aspect ratio (:1):
    ca. 3.8 :1
    Range of aspect ratio (:1):
    >= 3.1 - <= 4.6
    Additional information:
    The determined particle size distribution relates to both shape categories. The smallest dimension of all particles had been considered.

    ASSEMBLY STRUCTURE: homogeneous and solid particles.

    RIGIDITY: not required/appropriate.
    Fraction of constituent particles in the size range 1-100 nm:
    >= 80 - ca. 100 %
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D90
    Typical value:
    ca. 0.1 μm
    Range:
    > 0.075 - < 0.125 μm
    Percentile:
    D50
    Typical value:
    ca. 0.065 μm
    Range:
    > 0.04 - < 0.09 μm
    Percentile:
    D10
    Typical value:
    ca. 0.044 μm
    Range:
    > 0.02 - < 0.065 μm
    Additional information:
    The determined particle size distribution relates to both shape categories. The smallest dimension of all particles had been considered.

    ASSEMBLY STRUCTURE: homogeneous and solid particles.

    RIGIDITY: not required/appropriate.
    Fraction of constituent particles in the size range 1-100 nm:
    >= 80 - ca. 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C.I. Pigment Yellow 74
    Pure structure:
    yes
    Crystal system:
    triclinic
    Bravais lattice:
    primitive triclinic

    Specific surface area

    Typical specific surface area:
    ca. 14 m²/g
    Range of specific surface area:
    >= 10 - <= 18 m²/g
    Skeletal density:
    1.442 g/cm³

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    This nanoform is covered by a registration:
    no
    Name of nanoform:
    Pigment Yellow 74

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Shape:
    cubic
    Pure shape:
    no
    Typical composition:
    ca. 91 %
    Range:
    >= 91 - <= 91 %
    Shape category:
    elongated
    Shape:
    rod
    Pure shape:
    no
    Typical composition:
    ca. 9 %
    Range:
    >= 9 - <= 9 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    spheroidal
    Remarks:
    The particle size distribution relates to both shape categories
    Percentileopen allclose all
    Percentile:
    D10
    Range:
    >= 29 - <= 41 nm
    Percentile:
    D50
    Range:
    >= 46 - <= 82 nm
    Percentile:
    D90
    Range:
    >= 89 - <= 234.2 nm
    Fraction of constituent particles in the size range 1-100 nm:
    >= 62.7 - <= 94.7 %
    Shape category:
    elongated
    Remarks:
    The particle size distribution relates to both shape categories
    Percentileopen allclose all
    Percentile:
    D10
    Range:
    >= 29 - <= 41 nm
    Percentile:
    D50
    Range:
    >= 46 - <= 82 nm
    Percentile:
    D90
    Range:
    >= 89 - <= 234.2 nm
    Range of length:
    >= 19 - <= 355 nm
    Range of aspect ratio (:1):
    >= 3 - <= 5
    Fraction of constituent particles in the size range 1-100 nm:
    >= 62.7 - <= 94.7 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    Pigment yellow 74
    Pure structure:
    yes

    Specific surface area

    Range of specific surface area:
    >= 32.4 - <= 32.6 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: bulk


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    PY74_Nano_Multimodal

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    no
    Typical composition:
    ca. 49 %
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    cubic
    Pure shape:
    no
    Typical composition:
    ca. 47 %
    Range:
    >= 0 - <= 100 %
    Shape category:
    elongated
    Shape:
    rod
    Pure shape:
    no
    Typical composition:
    ca. 4 %
    Range:
    >= 0 - <= 100 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 38 nm
    Range:
    >= 10 - <= 65 nm
    Percentile:
    D50
    Typical value:
    ca. 63 nm
    Range:
    >= 20 - <= 100 nm
    Percentile:
    D90
    Typical value:
    ca. 106 nm
    Range:
    >= 40 - <= 200 nm
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - <= 100 %
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 57 nm
    Range:
    >= 10 - <= 65 nm
    Percentile:
    D50
    Typical value:
    ca. 77 nm
    Range:
    >= 20 - <= 100 nm
    Percentile:
    D90
    Typical value:
    ca. 107 nm
    Range:
    >= 40 - <= 200 nm
    Typical length:
    ca. 305 nm
    Range of length:
    >= 70 - <= 800 nm
    Typical aspect ratio (:1):
    ca. 3.9 :1
    Range of aspect ratio (:1):
    >= 3 - <= 8
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - <= 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C.I. Pigment Yellow 74
    Pure structure:
    yes
    Typical composition:
    ca. 100 %
    Range:
    >= 100 %

    Specific surface area

    Typical specific surface area:
    ca. 11.1 m²/g
    Range of specific surface area:
    >= 5 - <= 200 m²/g
    Skeletal density:
    ca. 1.239 g/cm³

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: bulk


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    Pigment Yellow 74_Nanoform_Spheroidal

    Shape

    Shape description
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    yes

    Particle size distribution and range

    Particle size distribution and range
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 20 nm
    Range:
    > 10 - <= 20 nm
    Percentile:
    D50
    Typical value:
    ca. 45 nm
    Range:
    >= 30 - <= 60 nm
    Percentile:
    D90
    Typical value:
    ca. 90 nm
    Range:
    >= 70 - <= 120 nm
    Fraction of constituent particles in the size range 1-100 nm:
    ca. 89 - < 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    Pigment Yellow 74
    Pure structure:
    yes
    Crystal system:
    not applicable

    Specific surface area

    Typical specific surface area:
    ca. 34 m²/g
    Range of specific surface area:
    >= 20 - <= 50 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    This nanoform is covered by a registration:
    yes
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Remarks:
    Multimodal shapes
    Shape:
    polyhedral
    Pure shape:
    yes
    Typical composition:
    88.61 %
    Range:
    > 1 - < 100 %
    Shape category:
    elongated
    Remarks:
    Needle-like particles
    Shape:
    rod
    Pure shape:
    yes
    Typical composition:
    11.39 %
    Range:
    > 1 - < 50 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    elongated
    Remarks:
    Needle-like particles
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    0.047 μm
    Range:
    > 0.03 - < 0.049 μm
    Percentile:
    D50
    Typical value:
    0.068 μm
    Range:
    > 0.051 - < 0.08 μm
    Percentile:
    D90
    Typical value:
    0.106 μm
    Range:
    > 0.09 - < 0.11 μm
    Range of length:
    > 0.117 - < 0.558 μm
    Range of aspect ratio (:1):
    >= 3 - <= 4.9
    Fraction of constituent particles in the size range 1-100 nm:
    > 1 - < 100 %
    Shape category:
    spheroidal
    Remarks:
    Multimodal shapes
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    0.046 μm
    Range:
    > 0.03 - < 0.049 μm
    Percentile:
    D50
    Typical value:
    0.072 μm
    Range:
    > 0.05 - < 0.08 μm
    Percentile:
    D90
    Typical value:
    0.118 μm
    Range:
    > 0.1 - < 0.2 μm
    Fraction of constituent particles in the size range 1-100 nm:
    > 1 - < 100 %

    Crystallinity

    Structures
    Structure:
    amorphous
    Pure structure:
    no
    Range:
    > 5 - < 10 %

    Specific surface area

    Typical specific surface area:
    13.23 m²/g
    Range of specific surface area:
    > 10 - < 15 m²/g
    Typical volume specific surface area:
    42.82 m²/cm³

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    This nanoform is covered by a registration:
    yes
    Name of nanoform:
    Pigment Yellow 74

    Shape

    Shape descriptionopen allclose all
    Shape category:
    elongated
    Shape:
    other: needle
    Pure shape:
    no
    Typical composition:
    6 %
    Range:
    > 3 - < 10 %
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    no
    Typical composition:
    94 %
    Range:
    > 90 - < 97 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    26 nm
    Range:
    > 20 - < 30 nm
    Percentile:
    D50
    Typical value:
    40 nm
    Range:
    > 30 - < 55 nm
    Percentile:
    D90
    Typical value:
    60 nm
    Range:
    > 50 - < 75 nm
    Fraction of constituent particles in the size range 1-100 nm:
    >= 100 - <= 100 %
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    32 nm
    Range:
    > 25 - < 40 nm
    Percentile:
    D50
    Typical value:
    37 nm
    Range:
    > 32 - < 45 nm
    Percentile:
    D90
    Typical value:
    50 nm
    Range:
    > 40 - < 65 nm
    Typical length:
    144.8 nm
    Range of length:
    > 92 - < 202 nm
    Typical aspect ratio (:1):
    3.6 :1
    Range of aspect ratio (:1):
    >= 3 - <= 4.16
    Fraction of constituent particles in the size range 1-100 nm:
    >= 100 - <= 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    Pigment Yellow 74
    Pure structure:
    yes
    Crystal system:
    not applicable

    Specific surface area

    Typical specific surface area:
    9.58 m²/g
    Range of specific surface area:
    >= 3 - <= 14.3 m²/g
    Typical volume specific surface area:
    13.4 m²/cm³
    Range of volume specific surface area:
    >= 4 - <= 19.83 m²/cm³
    Skeletal density:
    >= 1.332 - <= 1.445 g/cm³

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Shape:
    polyhedral
    Typical composition:
    85 %
    Range:
    > 0 - <= 100 %
    Shape category:
    elongated
    Shape:
    rod
    Typical composition:
    15 %
    Range:
    > 0 - <= 100 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    20.9 nm
    Range:
    > 10 - < 65 nm
    Percentile:
    D50
    Typical value:
    50.3 nm
    Range:
    > 20 - < 100 nm
    Percentile:
    D90
    Typical value:
    75.8 nm
    Range:
    > 40 - < 200 nm
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    20.9 nm
    Range:
    > 10 - < 65 nm
    Percentile:
    D50
    Typical value:
    50.3 nm
    Range:
    > 20 - < 100 nm
    Percentile:
    D90
    Typical value:
    75.8 nm
    Range:
    > 40 - < 200 nm
    Typical length:
    110 nm
    Range of length:
    > 50 - < 150 nm
    Typical aspect ratio (:1):
    4 :1
    Range of aspect ratio (:1):
    >= 3 - <= 8
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    crystalline (C.I. Pigment Yellow 74)
    Pure structure:
    yes
    Range:
    > 20 - < 90 %

    Specific surface area

    Typical specific surface area:
    52 m²/g
    Range of specific surface area:
    >= 5 - <= 125 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    Does the set contain both treated and non-surface treated nanoforms?:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    elongated
    Remarks:
    multimodal shapes containing abot 99% spheroidal particles and about 1% elongated particles
    Shape:
    rod
    Pure shape:
    no
    Typical composition:
    ca. 1 %
    Range:
    > 0 - < 10 %
    Shape category:
    spheroidal
    Remarks:
    multimodal shapes containing about 99% spheroidal particles and about 1% elongated particles
    Shape:
    spherical
    Pure shape:
    no
    Typical composition:
    ca. 25 %
    Range:
    > 5 - < 60 %
    Shape category:
    spheroidal
    Remarks:
    multimodal shapes containing about 99% spheroidal particles and about 1% elongated particles
    Shape:
    cubic
    Pure shape:
    no
    Typical composition:
    ca. 74 %
    Range:
    > 40 - < 95 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D90
    Typical value:
    ca. 0.1 μm
    Range:
    > 0.075 - < 0.125 μm
    Percentile:
    D50
    Typical value:
    ca. 0.065 μm
    Range:
    > 0.04 - < 0.09 μm
    Percentile:
    D10
    Typical value:
    ca. 0.044 μm
    Range:
    > 0.02 - < 0.065 μm
    Range of length:
    > 0.175 - < 0.675 μm
    Typical aspect ratio (:1):
    ca. 3.8 :1
    Range of aspect ratio (:1):
    >= 3.1 - <= 4.6
    Additional information:
    The determined particle size distribution relates to both shape categories. The smallest dimension of all particles had been considered.

    ASSEMBLY STRUCTURE: homogeneous and solid particles.

    RIGIDITY: not required/appropriate.
    Fraction of constituent particles in the size range 1-100 nm:
    >= 80 - ca. 100 %
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D90
    Typical value:
    ca. 0.1 μm
    Range:
    > 0.075 - < 0.125 μm
    Percentile:
    D50
    Typical value:
    ca. 0.065 μm
    Range:
    > 0.04 - < 0.09 μm
    Percentile:
    D10
    Typical value:
    ca. 0.044 μm
    Range:
    > 0.02 - < 0.065 μm
    Additional information:
    The determined particle size distribution relates to both shape categories. The smallest dimension of all particles had been considered.

    ASSEMBLY STRUCTURE: homogeneous and solid particles.

    RIGIDITY: not required/appropriate.
    Fraction of constituent particles in the size range 1-100 nm:
    >= 80 - ca. 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C.I. Pigment Yellow 74
    Pure structure:
    yes
    Crystal system:
    triclinic
    Bravais lattice:
    primitive triclinic

    Specific surface area

    Typical specific surface area:
    ca. 14 m²/g
    Range of specific surface area:
    >= 10 - <= 18 m²/g
    Skeletal density:
    1.442 g/cm³

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74_nanoform

    Shape

    Shape description
    Shape category:
    spheroidal
    Shape:
    polyhedral
    Pure shape:
    yes

    Particle size distribution and range

    Particle size distribution and range
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 32 nm
    Range:
    >= 23 - <= 41 nm
    Percentile:
    D50
    Typical value:
    ca. 45 nm
    Range:
    >= 31 - <= 65 nm
    Percentile:
    D90
    Typical value:
    ca. 64 nm
    Range:
    >= 43 - <= 96 nm
    Fraction of constituent particles in the size range 1-100 nm:
    >= 80 - <= 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C. I. Pigment Yellow 74
    Pure structure:
    yes
    Typical composition:
    ca. 90 %
    Range:
    >= 80 - <= 100 %
    Crystal system:
    not applicable

    Specific surface area

    Typical specific surface area:
    ca. 39 m²/g
    Range of specific surface area:
    >= 20 - <= 90 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    Pigment Yellow 74_Nanoform_Spheroidal

    Shape

    Shape description
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    yes

    Particle size distribution and range

    Particle size distribution and range
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 54.9 nm
    Range:
    > 1 - < 70 nm
    Percentile:
    D50
    Typical value:
    ca. 99 nm
    Range:
    > 10 - < 120 nm
    Percentile:
    D90
    Typical value:
    ca. 1 848 nm
    Range:
    > 120 - < 300 nm
    Fraction of constituent particles in the size range 1-100 nm:
    > 50 - <= 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    Pigment Yellow 74
    Pure structure:
    yes

    Specific surface area

    Typical specific surface area:
    ca. 20 m²/g
    Range of specific surface area:
    > 5 - <= 100 m²/g

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: nanoform


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide

    Characterisation of nanoforms

    Type of information reported:
    single nanoform
    Name of nanoform:
    C.I. Pigment Yellow 74-joint submission

    Shape

    Shape descriptionopen allclose all
    Shape category:
    spheroidal
    Shape:
    polyhedral
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    spherical
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    spheroidal
    Shape:
    cubic
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %
    Shape category:
    elongated
    Shape:
    rod
    Pure shape:
    no
    Range:
    >= 0 - <= 100 %

    Particle size distribution and range

    Particle size distribution and rangeopen allclose all
    Shape category:
    spheroidal
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 0.03 μm
    Range:
    > 10 - < 65 μm
    Percentile:
    D50
    Typical value:
    ca. 0.045 μm
    Range:
    > 0.02 - < 0.1 μm
    Percentile:
    D90
    Typical value:
    ca. 0.095 μm
    Range:
    > 0.04 - < 0.2 μm
    Additional information:
    The particle size distribution relates to all shape categories
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %
    Shape category:
    elongated
    Percentileopen allclose all
    Percentile:
    D10
    Typical value:
    ca. 0.03 μm
    Range:
    >= 0.01 - <= 0.065 μm
    Percentile:
    D50
    Typical value:
    ca. 0.04 μm
    Range:
    >= 0.02 - <= 0.1 μm
    Percentile:
    D90
    Typical value:
    ca. 0.07 μm
    Range:
    >= 0.04 - <= 0.2 μm
    Range of length:
    >= 0.07 - <= 0.8 μm
    Range of aspect ratio (:1):
    >= 3 - <= 8
    Additional information:
    The particle size distribution relates to all shape categories
    Fraction of constituent particles in the size range 1-100 nm:
    >= 50 - ca. 100 %

    Crystallinity

    Structures
    Structure:
    crystalline
    Name:
    C.I. Pigment Yellow 74
    Pure structure:
    yes

    Specific surface area

    Typical specific surface area:
    ca. 20 m²/g
    Range of specific surface area:
    >= 5 - <= 125 m²/g
    Skeletal density:
    ca. 1.4 g/cm³

    Surface functionalisation / treatment

    Surface treatment applied:
    no
    State Form:
    solid: particulate/powder


    Constituent 1
    Chemical structure
    Reference substance name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    EC Number:
    228-768-4
    EC Name:
    2-[(2-methoxy-4-nitrophenyl)azo]-N-(2-methoxyphenyl)-3-oxobutyramide
    CAS Number:
    6358-31-2
    Molecular formula:
    C18H18N4O6
    IUPAC Name:
    2-[(2-methoxy-4-nitrophenyl)diazenyl]-N-(2-methoxyphenyl)-3-oxobutanamide
    State Form:
    solid: particulate/powder