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Physical & Chemical properties

Flammability

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Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008-12-02 to 2008-12-02
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Version / remarks:
92/69/EEC
Deviations:
no
Principles of method if other than guideline:
NA
GLP compliance:
yes (incl. certificate)

The test item potassium cyanate did not ignite in the preliminary test. Potassium cyanate was not considered highly flammable. No further testing is required.

Interpretation of results:
non flammable
Conclusions:
The test item potassium cyanate was not considered highly flammable.
Executive summary:

The test item potassium cyanate did not ignite in the preliminary test. Potassium cyanate was not considered highly flammable. No further testing is required.

Description of key information

No study is available for sodium cyanate. Read across from potassium cyanate was performed instead. In aqueous solution cyanate salts dissociate very quickly to cyanate ion and the respective alkali metal ion. It is not expected that Na+ or K+ contribute to the flammability.
Potassium cyanate was shown to be not flammable. In addition no flammability in contact with water and no pyrophoric abilities are expected. These studies are thus been waived.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

Read across from potassium cyanate:

Potassium cyanate did not ignite in the preliminary test. Potassium cyanate was not considered highly flammable.

In accordance with Annex I, Section 2.1, Section 2.2, Section 2.3, Section 2.7, Section 2.9, Section 2.10 Section 2.11, Section 2.12 of Regulation (EC) No 1272/2008 and UN GHS Rev 6 (2015) the substance has not to be classified as readily combustible solid in class 4 Division 4.1, self-heating substance in Class 4 Division 4.2, substances which in contact with water emit flammable gases in Class 4 Division 4.3, pyrophoric liquid, pyrophoric solid in class 4 Division 4.2, flammable gases in class 2 or as aerosol in class 2 (the substance is a solid). No further testing is required.No further testing is required.

Justification for classification or non-classification

Based on the results of the flammability test (non flammable) and taking into account the provisions laid down in Regulation (EC) No 127272008 (CLP), as amended for the tenth time in Regulation (EU) No 2017/776, sodium cyanate does not have to be classified with respect to flammability.