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EC number: 201-075-4 | CAS number: 78-00-2
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:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- No detail of the method used is available
- GLP compliance:
- not specified
- Key result
- Melting / freezing pt.:
- -134 °C
- Atm. press.:
- 1 atm
- Conclusions:
- The melting point was reported to be -134°C
- Executive summary:
Although precise details of the test method used are not quoted, the result obtained is consistent with that of other melting point studies on this material. Therefore it is considered suitable for use as part of the weight of evidence used for this endpoint
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- No detail of the method used is available
- GLP compliance:
- not specified
- Key result
- Melting / freezing pt.:
- -136 °C
- Atm. press.:
- 1 atm
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The melting point was reported to be -136°C
- Executive summary:
Although precise details of the test method used are not quoted, the result obtained is consistent with that of other melting point studies on this material. Therefore it is considered suitable for use as part of the weight of evidence used for this endpoint
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Qualifier:
- according to guideline
- Guideline:
- other: Measurement with calorimeter
- Principles of method if other than guideline:
- Measurement with calorimeter
- GLP compliance:
- not specified
- Type of method:
- other: Measurement with calorimeter
- Key result
- Melting / freezing pt.:
- -137.6 - -130.2 °C
- Atm. press.:
- 1 atm
- Decomposition:
- no
- Conclusions:
- The melting point was reported to be in the range of -137.6 to -130.2°C
- Executive summary:
Although precise details of the test method used are not quoted, the result obtained is consistent with that of other melting point studies on this material. Therefore it is considered suitable for use as part of the weight of evidence used for this endpoint
Referenceopen allclose all
Description of key information
A Measurement by a Calorimeter based method reported by Staveley et al found the melting point to be in the range of -137.6°C to -130.2°C.
Another study by Falbe supports this and quotes the melting point as -136°C.
A third source, Daubert quotes a melting point of -134°C
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -134 °C
Additional information
Although precise details of the test methods used are not quoted, the results obtained from 3 melting point studies on this substance are consistent with each other. Therefore they are considered suitable for use as part of the weight of evidence used for this endpoint.
Measurements by Staveley et al referenced in the J. Chem Society using a Calorimeter method found the melting point to be in the range of -137.6°C to -130.2°C. Another measurement by Falbe supports this and quotes the melting point as -136°C. A third source, Daubert quotes a melting point of -134°C. The arithmetic average of -134°C is selected as the key value for the CSA.
In accordance with Column 2 adaptation statement of REACH Annex VII, Information requirement section 7.2, this study does not need to be conducted below a lower limit of -20°C and as such, no further work is planned
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