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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Auto flammability

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Link to relevant study record(s)

Description of key information

The test item hydroxy(2-methylprop-2-enoato-O)zinc should be considered as not auto-flammable up to the melting point of as 227-231 °C. 
An increase in the temperature of the sample in comparison to that of the oven could be detected at 354.4 °C oven temperature.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
354.4 °C

Additional information

This study was performed in order to determine the relative self-ignition temperature of hydroxy(2-methylprop-2-enoato-O)zinc according to the EU method A.16 under GLP.

Beginning at an oven temperature of approx. 353.6 °C, the temperature of the test item rose above the temperature of the oven, and at an oven temperature of 354.4 °C, the ZPA 3 detected an increase of temperature over 400 °C. The melting point of the test item is known as 227-231 °C

 Therefore, the test item hydroxy(2-methylprop-2-enoato-O)zinc should be considered as not auto-flammable up to the melting point of as 227-231 °C. 

The increase of temperature was considered to be caused by combustion of decomposition products.

Two deviations have been considered but not critical for the study.

The result has been considered as reliable without restriction because the test was performed in compliance with OECD and EU guidelines giving scientifically valid results.