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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:
august 1993 - november 1994
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Remarks:
The test methods are described in separate documents.
Qualifier:
equivalent or similar to
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
yes
Remarks:
slightly different test methods
Principles of method if other than guideline:
The test methods are described in another document. This does not impair the conclusion of the test results.
The principles of the test methods including their deviations to the guideline are described in detail in the field "any other information on materials and methods".
GLP compliance:
not specified
Key result
Test procedure:
burning time (test type not further specified)
Burning time:
0 s

Dicyandiamide could not be ignited by the 1000°C hot platin wire, which was dipped for 5 seconds into the dried substance.

Dicyandiamide could not be ignited by an open gas flame which was held onto the substance for approx. 10-15 seconds.

Dicyandiamide could not be ignited when put into a red heated iron bowl for 60 seconds. Dicyandiamide mixed with potassium nitrate an explosive flame occurs.

Interpretation of results:
GHS criteria not met
Conclusions:
Dicyandiamide is considered to be not flammable.
Executive summary:

The tests were conducted according to guidelines similar to guideline A.10.

Dicyandiamide could not be ignited by the 1000°C hot platin wire, which was dipped for 5 seconds into the substance.

In a second test approx. 200 mg of dicyandiamide were put into a flat iron bowl and heated with an open gas flame burner for 10-15 seconds. No ignition of dicyandiamide was observed.

In a third test dicyandiamide and a 1:1 mixture of dicyandiamide with potassium nitrate were put into a red heated iron bowl for 60 seconds respectively. Whereas dicyandiamide could not be igntied the mixture scorched shortly and extinguished quickly.

Therefore it is concluded that dicyandiamide is not flammable.

Description of key information

There is one study available similar to guideline A.10.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

The tests were conducted according to guidelines similar to guideline A.10. Dicyandiamide could not be ignited by the 1000°C hot platin wire, which was dipped for 5 seconds into the substance. In a second test approx. 200 mg of dicyandiamide were put into a flat iron bowl and heated with an open gas flame burner for 10 -15 seconds. No ignition of dicyandiamide was observed. In a third test dicyandiamide and a 1:1 mixture of dicyandiamide with potassium nitrate were put into a red heated iron bowl for 60 seconds. Whereas dicyandiamide could not be ignited the mixture scorched shortly and extinguished quickly. Therefore it is concluded that dicyandiamide is not flammable.

Justification for classification or non-classification

2 -Cyanoguanidine does not ignite under the test conditions.

Therefore it is concluded that 2 -Cyanoguanidine is not highly flammable.