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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:
July – August, 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Well conducted study, according to EU and OECD guidelines, with Internal management system and certificate of analysis included in the report.
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
yes
Remarks:
The glass tube method uses a bigger glass tube than the capillary method. When the substance is solid at the initial test temperature, heating in the glass tube method is done in steps, whereas the capillary method uses a constant heating rate.
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
yes
Remarks:
The glass tube method uses a bigger glass tube than the capillary method. When the substance is solid at the initial test temperature, heating in the glass tube method is done in steps, whereas the capillary method uses a constant heating rate.
Principles of method if other than guideline:
The glass tube method uses a bigger glass tube than the capillary method (capillary method: 8 to 10 cm in length and 1.0 mm inner diameter)
When the substance is solid at the initial test temperature, heating in the glass tube method is done in steps, whereas the capillary method uses a constant heating rate.
The glass tube method is equivalent to the capillary method of Guidelines EC A1 and OECD 102.
GLP compliance:
no
Remarks:
Internal management system
Type of method:
other: glass tube method
Melting / freezing pt.:
< -28 °C

The test in the liquid batch at -28°C was continued for 7 weeks.

The appearance of the substance was assessed several times during this test period.

after 5 days     : clear liquid

after 8 days     : clear liquid

after 40 days    : clear liquid

after 51 days    : clear liquid, test stopped

No crystallization or freezing was observed.

 

Since the substance remained liquid at -28°C, it can be concluded that the melting/freezing point of the test substance is <-28°C.

Conclusions:
The freezing point of 1,1,3,3-Tetramethyl- butyl peroxyneodecanoates, 70% in isododecane is <-28°C.
Executive summary:

The freezing point of 1,1,3,3-Tetramethylbutyl peroxyneodecanoate, 70% in isododecane was determined according to EC Regulation No 440/2008, Guideline A.1and according to OECD Guideline 102, and in accordance with European Chemicals Agency (ECHA), Guidance on information requirements and chemical safety assessment, Chapter R.7a, Endpoint specific guidance, May 2008.

The freezing point of 1,1,3,3-Tetramethyl- butyl peroxyneodecanoates, 70% in isododecane is <-28°C

Description of key information

The freezing point of 1,1,3,3-Tetramethyl- butyl peroxyneodecanoates, 70% in isododecane   is <-28°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-28 °C

Additional information

According to ECHA Guidance on information requirements and chemical safety assessment. Chapter R.7a: Endpoint specific guidance p 47: The study need not be conducted below a lower limit of -20 ° C.