Registration Dossier
Registration Dossier
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EC number: 231-274-1 | CAS number: 7474-78-4
Stability: thermal, sunlight, metals
Administrative data
- Endpoint:
- stability: thermal, sunlight, metals, other
- Remarks:
- Migrated from section 'Stability: thermal, sunlight, metals'
- Adequacy of study:
- key study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 3,4-diaminobenzenesulphonic acid
- EC Number:
- 231-274-1
- EC Name:
- 3,4-diaminobenzenesulphonic acid
- Cas Number:
- 7474-78-4
- Molecular formula:
- C6H8N2O3S
- IUPAC Name:
- 3,4-diaminobenzene-1-sulfonic acid
- Details on test material:
- Chemical Name (IUPAC): 3,4-diaminobenzenesulfonic acid
Molecular Formula: C6H8N2O3S
CAS-No.: 7474-78-4
Molecular Weight: 188.205 g/mol
Batch No.: N-18326
Purity: 99.8 [%, w/w]
Date of expiry: 15.09.2013
Certificate of analysis: No AZ-009-2011, 11.10.2011
Constituent 1
Results and discussion
For thermal stability study
- Test substance thermally stable:
- yes
Operating temperature
- Operating temp.:
- >= 20 - <= 150 °C
- Remarks on result:
- other: The substance seems to decompose at melting point (>286°C).
- Transformation products:
- not measured
Any other information on results incl. tables
No exothermic peak below 150°C was found in all five DSC tests. In two tests (test 1 and 3) a small exothermic peak was observed starting directly from an endothermic melting peak at approximately 290°C. It is highly probable that the decomposition of the test item already started during the melting process of the substance. So the endothermic and the exothermic event interfere with each other. The remaining tests showed no exothermic peak directly after the melting peak, but a shoulder in each endothermic peak was visible.
Each DSC thermogram was analyzed automatically with the Mettler Toledo Star software. The detected variance of the endothermic peaks is due to the unsteady peak shape, the limitations of the software algorithm and the test parameters. In the table below all observed data are summarized.
Endothermic events Test 1 Test 2 Test 3 Test 4 Test 5
Onset [°C] 283.87 292.40 284.82 290.81 286.84
Peak Maximum [°C] 287.53 300.33 289.27 293.07 291.31
Endset [°C] 290.92 311.87 292.30 296.10 294.07
Exothermic events Test 1 Test 2 Test 3 Test 4 Test 5
Onset [°C] ca. 290 ---- ca. 290 ---- ----
In none of the five DSC tests an exothermic effect below 150°C was found and therefore the test item is classified to be stable at room temperature.
Applicant's summary and conclusion
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