Registration Dossier
Registration Dossier
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EC number: 813-358-5 | CAS number: 4886-26-4
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:
- December 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- Regulation (EC) No 440/2008 of 30 May 2008
- Deviations:
- not specified
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 168.61 °C
- Decomposition:
- yes
- Decomp. temp.:
- >= 168 °C
- Sublimation:
- no
- Conclusions:
- The melting point of N-Phenyl-N'-[phenylamino)sulfonyl]urea is 168.61 °C (441.76 K). Under the conditions of measurement a decomposition of the substance is observed at temperatures above the melting temperature.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- December 2016 - January 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: OECD 113
- Version / remarks:
- 12. May 1981
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 161.42 °C
- Decomposition:
- yes
- Decomp. temp.:
- ca. 164 °C
- Sublimation:
- no
- Conclusions:
- The melting temperature 161.42 °C was measured.
Referenceopen allclose all
The samples were heated under inert gas from 20 °C to 190 °C using a heating rate of 10 K/min. As reference an empty crucible of the same kind was used. The heat flow and temperature was recorded by the DSC during the test. After the test the appearance of the test substance was inspected for visual changes and the crucible was weighted.
The weight of the used crucibles were unchanged after measurement. When heating the same sample again after determination of the melting point only a baseline was recorded. The test samples appeared as solid and slightly yellow.
The thermal behaviour of N-Phenyl-N'-[(phenylamino)sulfonyl]urea was measured with diffential scanning calorimetry, heating rate 3 °C/min. A small exothermal peak was detected at temperatures slightly above the melting point.
Description of key information
The melting point was determined by differential scanning calorimetry. Under the conditions of measurement a decomposition of the substance is observed at temperatures slightly above the melting temperature.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 161.42 °C
Additional information
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