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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
18 March 2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was limited to a preliminary, indicative test
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
Based on the expected low freezing temperature, the substance was stored under fixed temperature conditions.
GLP compliance:
yes
Type of method:
method to determine freezing temperature
Specific details on test material used for the study:
- Batch: 8191-34
- Purity: 97.8% (expressed as primary amine, % of total)
Key result
Melting / freezing pt.:
< -81 °C
Remarks on result:
other: Atmospheric pressure not reported; ambient conditions are anticipated.

Under all conditions / storage times, the samples were described as being a clear colourless liquid; the sample stored at

-80.7 °C had become slightly viscous after both the one and two hours storage period. Based on this very low freezing point no further testing was undertaken. This is in conformity with the ECHA endpoint specific guidance (R.7a) which indicates -20 °C to be the lower limit of the testing range.

Conclusions:
The freezing temperature of the substance was concluded to be below -81 °C under ambient conditions.

Description of key information

The freezing point of the test substance was determined in a GLP study according to test methods EC A.1 and OECD 102 to be below -81°C (Van der Baan-Treur, 2003).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-81 °C

Additional information

A preliminary test indicated a freezing point below the lower limit of measurement (-20 °C); a main study was therefore not conducted.