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Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
28 March 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: UN Method N1, 2009: “Test method for readily combustible solids”
Deviations:
not specified
GLP compliance:
yes (incl. QA statement)
Key result
Test procedure:
burning rate test: preliminary screening test
Remarks on result:
other: The test item ignited after contact with the flame, but after a burning distance of 1.5 cm, the propagating flame died and further combustion of the test item was observed only where the test item was in direct contact with the flame of the burner.
Remarks:
When the burner was removed, the flame at the test item died.

Results:

Safety Pre-Test

The test item ignited und burned for a short time with a yellow flame. After cooling down, the test item was grey coloured.

Preliminary Screening Test

The test item ignited after contact with the flame, but after a burning distance of 1.5 cm, the propagating flame died and further combustion of the test item was observed only where the test item was in direct contact with the flame of the burner. When the burner was removed, the flame at the test item died. After cooling down, the test item was grey-black coloured. No propagation of the combustion of the whole string was observed throughout the course of the test. The test item zinc methacrylate should be considered as not highly flammable. No observations were made which might cause doubts concerning the validity of the study outcome.

Interpretation of results:
other: not highly flammable
Conclusions:
The test item ignited after contact with the flame, but after a burning distance of 1.5 cm, the propagating flame died and further combustion of the test item was observed only where the test item was in direct contact with the flame of the burner. When the burner was removed, the flame at the test item died.
Executive summary:

This study was performed in order to determine the flammability of zinc methacrylate according to the EU.method A.10 and UN Method N1, 2009: “Test method for readily combustible solids” under GLP. The flammability is a physico-chemical property which is needed for hazard assessment and safety purposes. In the preliminary screening test, the test item was heated with the flame of a teclu burner. The test item ignited, but after a burning distance of 1.5 cm, the propagating flame died and further combustion of the test item was observed only where the test item was in direct contact with the flame of the burner. When the burner was removed, the flame at the test item died. After cooling down, the test item had turned grey-black. Therefore, the test item zinc methacrylate should be considered as not highly flammable (Henke, 2013).

Description of key information

The test item ignited after contact with the flame, but after a burning distance of 1.5 cm, the propagating flame died and further combustion of the test item was observed only where the test item was in direct contact with the flame of the burner. When the burner was removed, the flame at the test item died.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Key study was performed in order to determine the flammability of zinc methacrylate according to the EU.method A.10 and UN Method N1, 2009: “Test method for readily combustible solids” under GLP. In the preliminary screening test, the test item was heated with the flame of a teclu burner. The test item ignited, but after a burning distance of 1.5 cm, the propagating flame died and further combustion of the test item was observed only where the test item was in direct contact with the flame of the burner. When the burner was removed, the flame at the test item died. After cooling down, the test item had turned grey-black. Therefore, the test item zinc methacrylate should be considered as not highly flammable (Henke, 2013).

Justification for classification or non-classification

As the substance failed to ignite in the burning rate test (EC A10 method), it is classified as not highly flammable according to Directive 67/548/EEC Annex VI criteria. The preliminary test in EC A10 method is identical to the one of test N1 of UN manual of tests and criteria (Recommendations on the transport of dangerous goods, 4th revised edition, 2008), therefore the result also fulfills criteria for non-classification according to Regulation (EC) No.1272/2008 (CLP)."