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Physical & Chemical properties

Auto flammability

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Endpoint:
relative self-ignition temperature (solids)
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
A study for auto-flammability is not required as Synthetic Wollastonite shows no self-heating to 400 °C, based on inert inherent properties.

Furthermore, experience of manufacture and use shows no evidence of self-heating. A study carried out on the analogue substance Kieselghur soda ash flux calcined showed no evidence of self-heating. Justification for read-across is warranted given the similarities in toxicity profile and physico-chemical properties for Soda-ash flux calcined kieselghur and synthetic wollastonite.
Reason / purpose for cross-reference:
data waiving: supporting information
Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
Testing was conducted between 15 March 2010 and 23 March 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: Method N.4 of the UN Transport of Dangerous Goods, Manual of Tests and Criteria, fourth revised edition, 2003
GLP compliance:
yes (incl. QA statement)

There were no signs of self-ignition or self heating over the duration of the test.

Conclusions:
A negative result was obtained. Therefore the material is not classified in Division 4.2

Description of key information

A study for auto-flammability is not required as Synthetic Wollastonite shows no self-heating to 400 °C, based on inert inherent properties.


Furthermore, experience of manufacture and use shows no evidence of self-heating. A study carried out on the analogue substance Kieselghur soda ash flux calcined showed no evidence of self-heating, based on this it can be concluded that Synthetic Wollastonite should be considered to be not classified for auto-flammability.

Key value for chemical safety assessment

Additional information

In accordance with column 2 of REACH Annex VII, testing (required in section 7.12) is not needed because the test item shows no self-heating to 400 °C, based on inert inherent properties. Furthermore a study carried out on the analogue substance Kieselghur soda ash flux calcined, was negative for auto-flammability.