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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
accepted calculation method
Justification for type of information:
Data is from publication.
Qualifier:
according to guideline
Guideline:
other: as mentioned below
Principles of method if other than guideline:
The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined using Linkam TMS91 melting point apparatus.
GLP compliance:
not specified
Type of method:
other: Linkam TMS91 melting point apparatus
Specific details on test material used for the study:
Name of the test chemical: 1,4-diamino-2,3-dichloroanthraquinone
Molecular formula: C14H8Cl2N2O2
Molecular weight: 307.135 g/mol
Smiles Notation: c1cc2c(cc1)C(=O)c1c(c(c(c(c1N)Cl)Cl)N)C2=O
InChI: 1S/C14H8Cl2N2O2/c15-9-10(16)12(18)8-7(11(9)17)13(19)5-3-1-2-4-6(5)14(8)20/h1-4H,17-18H2
Substance Type: Organic
Physical State: Solid crystal powder (purple-black)
Key result
Melting / freezing pt.:
294.85 °C
Remarks on result:
other: 568 K

Table 1. Physicochemical properties of the hydrophobic dyesa

Dye

Dye class

MW

λ max (nm)

Tm (K)

D1

Anthraquinone

422

539 (310, 577)

468

D2

Anthraquinone

307

552 (306, 588)

568

D3

Sulphone

369

414 (295)

433

D4

Anthraquinone

349

620 (300, 580)

516

D5

Azo

625

596

405

D6

Anthraquinone

456

550 (486, 515)

437

D7

Azo

405

620 (575)

525

D8

Azo

438

507 (327)

440

D9

Azo

337

434

524

aMW= molecular weight; λmax = experimental absorption maximum as determined in dichloromethane (in parentheses, smaller absorption maxima or those below 400 nm);                         

Tm = experimental melting point;

Conclusions:
The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined as 294.85 °C (568 K).
Executive summary:

The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined using Linkam TMS91 melting point apparatus.

The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined as 294.85 °C (568 K)

Description of key information

The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined as 294.85 °C (568 K).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
294.85 °C

Additional information

The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined using Linkam TMS91 melting point apparatus.

The melting point of 1,4-diamino-2,3-dichloroanthraquinone was determined as 294.85 °C (568 K)

Other supporting study from authoritative database Scifinder, exhibited the melting point of 1,4-diamino-2,3-dichloroanthraquinone as 295 °C, very much closer to the selected key value.