Registration Dossier
Registration Dossier
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EC number: 205-009-5 | CAS number: 131-08-8
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:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- no
- Type of method:
- thermal analysis
- Remarks:
- Differential Thermal Analysis
- Decomposition:
- yes
- Remarks:
- Between about 130 °C and 230 °C and from about 300 °C endothermic effects are detected which indicates an endothermic decomposition.
- Decomp. temp.:
- ca. 130 °C
- Conclusions:
- For Anthrachinon-2-sulfonic acid sodium salt no melting point could be detected (1,017 hPa) according to EC A.1.
- Executive summary:
The test was performed as stipulated in EC Test Procedure A.1 'Melting/Freezing Temperature' – ASTM E 537 ‘Standard method for assessing the thermal stability of chemicals by methods of differential thermal analysis’.
The Differential Thermal Analysis (DTA) was used. This technique records the difference of the temperature of a substance and an empty measuring cell. The substance and reference cell were subjected to the same controlled temperature programme. The screening-DTA (heating rate 3 K/min, closed glass ampoule) of the sample shows several
endothermic effects. Between about 130 °C and 230 °C and from about 300 °C endothermic effects are detected which indicates an endothermic decomposition. The second run of the sample shows that the endothermic effect observed at
about 420 °C is the melting of the decomposition product of the original sample.
For Anthrachinon-2 -sulfonic acid sodium salt no melting point could be detected (1,017 hPa) according to EC A.1.
Reference
Description of key information
For Anthrachinon-2-sulfonic acid sodium salt no melting point could be detected (1,017 hPa) according to EC A.1.
Between about 130 °C and 230 °C and from about 300 °C endothermic effects are detected which indicates an endothermic decomposition.
Key value for chemical safety assessment
Additional information
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