Zinc methacrylate

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 28 March to 02 April 2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Relative self-ignition temperature:

ca. 377 °C

Findings

Temperature Data

The temperatures which were measured in the experiment are presented in the following table. As more than 120 values were recorded, only the values every 60 minutes are presented.

Table of presentation of Temperatures versus Time:

Time in min	Temperature (oven) in °C	Temperature (test item) in °C
0005	23.7	23.6
0060	49.7	37.0
0120	86.2	68.7
0180	120.0	101.7
0240	156.1	138.8
0300	191.9	171.9
0360	228.0	210.2
0420	265.4	245.4
0480	300.5	281.4
0540	337.7	318.7
0600	373.3	376.3
0605 End	377.0	400.0

At 377.0 °C oven temperature the ZPA 3 detected increase of temperature over 400 °C. The test item zinc dimethacrylate is considered as auto-flammable at an oven temperature of 377.0 °C under the test conditions. The test item is known to decompose at temperatures above 200°C. Therefore, it can be considered that the auto-flammability is caused by decomposition products of the test item. No observations were made which might cause doubts concerning the validity of the study outcome.

Conclusions:

At 377.0 °C oven temperature the ZPA 3 detected increase of temperature over 400 °C. The test item zinc dimethacrylate is considered as auto-flammable at an oven temperature of 377.0 °C under the test conditions. The test item is known to decompose at temperatures above 200°C. Therefore, it can be considered that the auto-flammability is caused by decomposition products of the test item.

Executive summary:

This study was performed in order to determine the relative self ignition temperature of zinc dimethacrylate according to the EU method 16 under GLP. The self-ignition temperature as obtained by this method is the minimum ambient temperature expressed in °C at which a certain volume of a substance will ignite under defined conditions. At 377.0 °C oven temperature, the ZPA 3 detected an increase of the temperature over 400 °C. Therefore, the test item zinc dimethacrylate should be considered as auto-flammable at an oven temperature of 377.0 °C under the test conditions. As the test item is known to decompose at temperatures above 200 °C it can be considered that the auto-flammability is caused by decomposition products of the test item (Henke, 2013).

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

377 °C

Additional information

This study was performed in order to determine the relative self ignition temperature of zinc dimethacrylate according to the EU method 16 under GLP. The self-ignition temperature as obtained by this method is the minimum ambient temperature expressed in °C at which a certain volume of a substance will ignite under defined conditions. At 377.0°C oven temperature, the ZPA 3 detected an increase of the temperature over 400°C. Therefore, the test item zinc dimethacrylate should be considered as auto-flammable at an oven temperature of 377.0°C under the test conditions. As the test item is known to decompose at temperatures above 200°C it can be considered that the auto-flammability is caused by decomposition products of the test item (Henke, 2013).