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Physical & Chemical properties

Flammability

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Endpoint:
flammable gases
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the substance is a solid
Endpoint:
pyrophoric liquids
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the substance is a solid
Endpoint:
self-heating substances / mixtures
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance undergoes exothermic decomposition at a temperature below or equal to 140°C
Endpoint:
pyrophoric solids
Data waiving:
other justification
Justification for data waiving:
the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied
Endpoint:
substances / mixtures which in contact with water emit flammable gases
Data waiving:
other justification
Justification for data waiving:
the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water
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
Guideline:
EU Method A.10 (Flammability (Solids))
Version / remarks:
92/69/EEC
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Test procedure:
burning rate test: preliminary screening test
Remarks on result:
substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

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:
not classified based on GHS criteria
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

The test item potassium cyanate was shown to be not flammable. In addition no flammablility in contact with water and no pyrophoric abilities are expected. These studies are thus been waived.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

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.

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 seventeenth time in Regulation (EU) 2021/849, potassium cyanate does not have to be classified with respect to flammability.