Tetrakis{9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethylxanthylium} C12-(branched and/or linear)-alkyl-(4-sulfonatophenoxy)benzenesulfonate and oxybis[C12-(branched and/or linear)-alkyl-benzenesulfonate]

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The reliability is rated 2 because the study is well documented and meets generally accepted scientific principles. The results were reviewed for reliability and assessed as valid. Study not conducted under GLP conditions.

Data source

Reference

Reference Type:

other company data

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

similar to Kofler hot bar

Deviations:

yes

Remarks:

: hot bar PROLABO, temperature is homogenous on the hot bar

Principles of method if other than guideline:

Technic similar to the Kofler Hot bar.
Apparatus PROLABO, temperature is homegenous at every point of the hot bar

GLP compliance:

no

Type of method:

other: similar to Kofler hot stage

Test material

Test material information

Constituent 1

Reference substance name:

tetrakis{9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethylxanthylium} C12-(branched and/or linear)-alkyl-(4-sulfonatophenoxy)benzenesulfonate and oxybis[C12-(branched and/or linear)-alkyl-benzenesulfonate]

EC Number:

700-761-5

Molecular formula:

not applicable

IUPAC Name:

tetrakis{9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethylxanthylium} C12-(branched and/or linear)-alkyl-(4-sulfonatophenoxy)benzenesulfonate and oxybis[C12-(branched and/or linear)-alkyl-benzenesulfonate]

Details on test material:

- Name of test material (as cited in study report): Sepisol Fast RED SN
- Substance type: organic salt - UVCB
- Analytical purity: 97.1 % w/w - 98.1 % w/w
- batch: 029244
- Stability under test conditions: stable under test conditions
- Storage condition of test material: room temperature

Results and discussion

Melting / freezing point

Atm. press.:

1 013 hPa

Decomposition:

yes

Remarks:

micro bubbles

Decomp. temp.:

> 295 °C

Remarks on result:

other: The test item shows no melting point, with no liquid phase at no point but a softening of the test item from 180 to 185 °C.

Any other information on results incl. tables

Calibration of the hot bar Prolabo: A clear and sharp dividing line is observed and a fluid phase is appearing. We observed a temperature lag between the theoretical melting and the measured one, but the order of magnitude is correct.

 

Sepisol Fast Red SN: With the increase temperature, the test item became bright and soft. At no point a liquid state appeared.

 

Dowfax solution: First, the water is removed with apparition of a white and dry product, then the test item turned brown around 270°C: no melting.

Produit		T°C at which the product becomes sticky		Measured T°C of the « apparent melting »	Corrected T°C according the « standard »	Decomposition T°C
Ammonium dihydrogen phosphate Theoretical MP= 190 °C		185 °C		200 °C	Correction = -10 °C towards 200°C
Potassium thiocyanate Theoretical MP = 173 °C		172 °C		176 °C	Correction = -3°C towards 170°C
Red SN Lot 029244		165 °C		188 °C	No melting (softening at 180 – 185 °C)	295 °C Micro-bubbles
Dowfax 2A1 Lot WL 2401		260 °C		No melting	No melting	270 °C Product turns brown

Applicant's summary and conclusion

Conclusions:

Under normal conditions of pressure, Sepisol Fast Red SN has no melting point. It becames bright and soft at 180-185°C but with no liquid phase. The test item starts bubbling at 295°C and decomposes.