Registration Dossier
Registration Dossier
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EC number: 617-081-9 | CAS number: 80473-92-3
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
- Study period:
- 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- capillary method
- Melting / freezing pt.:
- >= 231 - <= 234 °C
- Conclusions:
- the test substance Thio-Acid has a melting range of 231-234°C
- Executive summary:
The test is conducted to determine the temperature or temperature range of the phase transition from a solid to a liquid.
The dry substance is finely pulverised in a mortar and is put into a capillary tube, fused at one end, so that the filling level is approximately 3 mm after being tightly packed. The temperature of the apparatus is heated to about 15°C below the expected melting temperature, then the filled capillary tubes are inserted and testing is started, generally at a maximum rate of 1°C/min.
This method has an estimated accuracy of ± 0.5°C.
The test is conducted in accordance with the procedure described in EU Regulation
(EC) 440/2008, Annex Part A test A1.
Reference
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Results 231 -234 °C (range)
Description of key information
Thioacid was identified to melt in the range of 231 to 234 °C.
Key value for chemical safety assessment
Additional information
The test was conducted to determine the temperature or temperature range of the phase transition from a solid to a liquid.
The dry substance was finely pulverised in a mortar and put into a capillary tube, fused at one end, so that the filling level is approximately 3 mm after being tightly packed. The temperature of the apparatus was heated to about 15°C below the expected melting temperature, then the filled capillary tubes were inserted and testing started, generally at a maximum rate of 1°C/min.
This method has an estimated accuracy of ± 0.5°C. The test is conducted in accordance with the procedure described in EU Regulation
(EC) 440/2008, Annex Part A test A1.
The mean of at least three measurements, which are in the range of the estimated accuracy, is reported as the melting temperature.
The result was a range of 231 -234 °C.
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