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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:
15 Mars 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Justification for type of information:
The test was conducted according to the protocol recommended in the EFFA/EFEO guideline, "The Registration for REACH of Natural Complex Substances used as Fragrance Ingredients" to describe the state of the essential oil at several temperatures. Test substance is adequately specified. Therefore full validation applies.
Qualifier:
no guideline required
Principles of method if other than guideline:
The test item is a mixture of constituents and transition from liquid to solid will not be sharp. The Guidance on information requirements and chemical safety assessment Chapter R.7a: Endpoint specific guidance from ECHA (2016) mentioned that "Melting points are not normally carried out for mixtures“. In addition, according to column 2, point 7.2 of Annex VII of REACH regulation, the study does not need to be conducted below a lower limit of -20°C“.
GLP compliance:
no
Type of method:
method to determine freezing temperature
Melting / freezing pt.:
< -20 °C
Decomposition:
no

Table 4.2/1.-Results

Room Temperature

-21.9°C for 26h

Clear, yellow liquid

Clear, yellow liquid

After a storage time of approx. 26 hours the test substance was still liquid and visual unchanged.

Therefore, no main test was performed in accordance with REACH annex VII.

Conclusions:
No freezing point could be obtained down to -20°C.
Executive summary:

A test was conducted in order to determine the physical state of the substance at room temperature and -20°C during at least 24 hours at atmospheric pressure.The test item was still liquid at - 20 °C.

According to Regulation (EC) No 1907/2006 (REACH) annex VII, column 2 of section 7.2, the determination of the melting / freezing point does not need to be conducted below a lower limit of - 20 °C. Therefore, no additional test was conducted and the freezing point is stated as < - 20 °C (< 253.15 K).

 

Description of key information

No freezing point down to -20 °C (253.15K).

No further testing required (< -20°C).

Key value for chemical safety assessment

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method, is available. Therefore, it is considered as a key study. As no crystallisation was observed down to -20°C, the result is expressed as a limit value, and cannot be retained as key data.

According to REACH annex VII, column 2 of section 7.2, the determination of the melting/ freezing point does not need to be conducted below a lower limit of - 20 °C.

Therefore, no additional test was conducted and the melting / freezing point was expressed as a limit value.