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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:
2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
GLP compliance:
yes
Type of method:
capillary method
Test material information:
Composition 1
Specific details on test material used for the study:
Zinc diacrylate (SR111); CAS No.: 14643-87-9; Lot No.: 30715-6482; Purity 100 %
Key result
Remarks on result:
not determinable

When the test substance was heated, the first time there was no obvious change. Because of this, this test was repeated at individual temperatures for seperate capillaries rather than heating one capillary over the entire range (60 -300 degrees C). At about 235 to 240 degrees C, it was observed that the sample collapsed and chaged from white to colorless. The sample never liquified.

Conclusions:
Zinc acrylate did not melt under the testing conditions. It underwent homopolymerization at approximately 235 to 240 degrees centigrade, a phenomenon known to occur for these type of chemicals.
Executive summary:

A study was conducted according to testing Guideline OPPTS 830.7200 to determine the melting of zinc acrylate. Under the testing conditions, the appearance of solid zinc acrylate changed from white to colourless but did not liquify. Due to homopolymerisation of the substance at 235 to 240 degrees centigrade, a melting point could not be determined (Holyoke, 2003).

Description of key information

The melting point was determined according to OPPTS Guideline 830.7200 (Holyoke, 2003).

Key value for chemical safety assessment

Additional information

No melting point but homopolymerization at approx. 235 to 240 °C.