Synthetic wollastonite

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

pyrophoric solids

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:

comparable to guideline study

Qualifier:

according to guideline

Guideline:

other: Method N.1 specified in the United Nations, Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, fourth revised edition 2003

GLP compliance:

yes (incl. QA statement)

Test procedure:

ignition time on contact with air

Remarks on result:

no ignition on contact with air (not further specified)

Remarks:

Ignition on contact with air refers to either Pyrophoric solids or Pyrophoric liquids depending on physical state.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The test material is not classified as a flammable solid as it failed to ignite in the preliminary screening test.

Reference 2

Endpoint:

flammable solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of REACH Annex VII, testing (required in section 7.10) 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 flammability.

Reason / purpose for cross-reference:

data waiving: supporting information

Description of key information

Experience of manufacture and use shows no evidence of flammability or Pyrophoric properties. Furthermore a study carried out on the analogue substance Kieselghur soda ash flux calcined showed no evidence of ignition on contact with air, based on this it can be concluded that Synthetic Wollastonite should be considered to be not classified for flammability.

Key value for chemical safety assessment

Flammability:

not classified

Justification for classification or non-classification

In accordance with column 2 of REACH Annex VII, testing (required in section 7.10) does not appear to be scientifically necessary because silica, the parent structure analogue of Synthetic Wollastonite, is not combustible and is known to be stable. Furthermore experience of manufacture and use shows no evidence of flammability or Pyrophoric properties.

A study carried out on the analogue substance Kieselghur soda ash flux calcined showed no evidence of ignition on contact with air, based on this it can be concluded that Synthetic Wollastonite should be considered to be not classified for flammability.