Registration Dossier
Registration Dossier
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EC number: 202-000-8 | CAS number: 90-51-7
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- Council Regulation (EC) No 440/2008 A.1 (ASTM E 537)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- other: thermal analysis and capillary method
Test material
- Reference substance name:
- 6-amino-4-hydroxynaphthalene-2-sulphonic acid
- EC Number:
- 202-000-8
- EC Name:
- 6-amino-4-hydroxynaphthalene-2-sulphonic acid
- Cas Number:
- 90-51-7
- Molecular formula:
- C10H9NO4S
- IUPAC Name:
- 6-amino-4-hydroxynaphthalene-2-sulphonic acid
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- > 355 °C
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: no melting has been observed up to 355 °C
Applicant's summary and conclusion
- Conclusions:
- The GLP study was performed according to EU method A.1 without deviations and therefore reliability of Klimisch 1 has been assigned. From 310 °C there was a slowly changing of the colour to grey/brown but no melting up to
355 °C. - Executive summary:
The melting point of the test substance was determined in a GLP test according to EU method A.1 using the DSC method first. As the effects were not reproducable the substance was heated using the capillary method in a melting device with liquid bath in order to observe the melting behaviour. The substance was heated up to 270 °C and then heated with a rate of 2 K/min. Until a temperature of 310 °C there were no optical changes. From 310 °C there were a slowly changing of the colour to grey/brown but no melting up to 355 °C. At the end of the measurement the substance was dark and a little sintered.
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