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Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2016-06-27
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
179.1 °C
Conclusions:
The melting point was determined according to a scientifically valid method, hence, the following result for the test material can be considered as reliable: The melting point of 4,8-dicyclohexyl-6-hydroxy-2,10-dimethyl-12Hdibenzo[d,g][1,3,2]dioxaphosphocin (CAS 73912-21-7) was determined in a OECD 102 study, using the DSC method. The melting point was determined as 179.1 °C.
Executive summary:

The melting point of 4,8-dicyclohexyl-6-hydroxy-2,10-dimethyl-12Hdibenzo[d,g][1,3,2]dioxaphosphocin (CAS 73912-21-7) was determined in a OECD 102 study, using the DSC method. The melting point was determined as 179.1 °C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-06-27
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
no
Type of method:
capillary method
Key result
Melting / freezing pt.:
101.2 °C
Decomposition:
no
Conclusions:
The melting point was determined according to a scientifically valid method, hence, the following result for the test material can be considered as reliable: The melting point of a production sample of 4,8-dicyclohexyl-6-hydroxy-2,10-dimethyl-12Hdibenzo[d,g][1,3,2]dioxaphosphocin (CAS 73912-21-7) was determined in a OECD 102 study. The melting point was determined to be 101.2 °C using a capillary tube.
Executive summary:

The melting point of a production sample of 4,8-dicyclohexyl-6-hydroxy-2,10-dimethyl-12Hdibenzo[d,g][1,3,2]dioxaphosphocin (CAS 73912-21-7) was determined in a OECD 102 study. The melting point was determined to be 101.2 °C using a capillary tube.

Description of key information

The melting point of a production sample of 4,8-dicyclohexyl-6-hydroxy-2,10-dimethyl-12Hdibenzo[d,g][1,3,2]dioxaphosphocin (CAS 73912-21-7) was determined in a OECD 102 study. The melting point was determined to be 101.2 °C using a capillary tube.

The melting point of 4,8-dicyclohexyl-6-hydroxy-2,10-dimethyl-12Hdibenzo[d,g][1,3,2]dioxaphosphocin (CAS 73912-21-7) was determined in a OECD 102 study, using the DSC method. The melting point was determined as 179.1 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
101.2 °C

Additional information

The melting point of both a purified sample and a production sample containing a certain amount of impurities was determined in a OECD 102 study.

The melting point of the registered substance was analyzed using DSC measurements first. According to these measurements the melting point for the purified substance was determined to be 179.1 °C. DSC measurements of production samples give several peaks, sometimes including glass transition points. Therefore the melting point of production sample was determined to be 101.2 °C using a capillary tube.

As the production sample describes the registered substance more precisely than the purified sample containing only the main constituent, the melting point of the production sample, i.e. 101.2°C, was chosen as the key value.