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EC number: 201-348-8 | CAS number: 81-42-5
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- 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
- 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)
Reference
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;
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.
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