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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:
December 07, 2017
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
no guideline followed
Principles of method if other than guideline:
Sample material was frozen by exposure to liquid nitrogen and a quantity of frozen material placed on the 18 mm cover glass of the apparatus. A second glass covers the sample and the assembly is placed on the heating stage. The melting point is reached when small drops of liquid appear on the cover glass. At this point the temperature on the electronic thermometer is read.
GLP compliance:
no
Type of method:
method to determine freezing temperature
Specific details on test material used for the study:
- Expiration date of the lot/batch: April 26th 2018
- Purity test date: 26 October 2017
Key result
Melting / freezing pt.:
-85 °C

Results

Test 1: Freezing point = -85 °C.

Test 2: Freezing point = -85 °C.

Test 3: Freezing point = -85 °C.

Conclusions:
2-Butoxyethyl methacrylate was observed to have an average freezing point of -85 °C.
Executive summary:

The melting / freezing point of 2-butoxyethyl methacrylate was determined in an experiment that utilised Fisher-Johns Type Melting Point Apparatus. The sample was frozen with liquid nitrogen and placed between glass covers within the apparatus. Following heating, the melting / freezing point temperature is achieved and the electric thermometer read when droplets of liquid are evident on the cover glass. The average freezing point of 2-butoxyethyl methacrylate from three test runs was determined to be -85 °C.

Description of key information

An average freezing point of -85 °C was calculated for 2-butoxyethyl methacrylate.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-85 °C

Additional information

The study from which the endpoint conclusion was obtained did not adhere to a guideline or national standard method but was well documented and met generally accepted scientific principles. The endpoint has, therefore, been assigned a Klimisch score of 2 (reliable with restrictions) and can be regarded as a key value for chemical safety assessment.