Synthetic wollastonite

Auto flammability

Link to relevant study record(s)

Reference

Reference 1

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

Reference 2

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.

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.