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Physical & Chemical properties

Flammability

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Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted between 31 March 2010 and 4 June 2010.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive and done to a valid guideline.
Qualifier:
according to guideline
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
no
Key result
Test procedure:
burning rate test: preliminary screening test
Burning time:
2 min
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

Results

Preliminary screening test

The pile failed to ignite during the two minutes the Bunsen burner flame was applied.

The result of the preliminary screening test obviated the need to perform the main test.

Moisture content

 

Determination A

Determination B

a) Mass of loss bottle (g)

18.8397

22.6929

b) Mass of loss bottle and test item (g)

19.8130

23.6802

c) Mass of loss bottle and test item    after drying (g)

19.8097

23.6768

Moisture content (% w/w)

0.339

0.344

Mean moisture content (% w/w)

0.342

Interpretation of results:
GHS criteria not met
Conclusions:
The test item has been determined to be not highly flammable as it failed to ignite in the preliminary screening test.
Executive summary:

Introduction

Methods employed are designed to be compatible with those specified in Commission Regulation (EC) No 440/2008 of 30 May 2008, Part A: Methods for the determination of physico-chemical properties.

Method

The flammability (solids) was determined by measuring the burning rate of test item prepared as a pile of set dimensions. Testing was conducted using a method designed to be compatible with Method A10 Flammability (Solids) of Commission Regulation (EC) No 440/2008 of 30 May 2008.

Conclusion

The test item has been determined to be not highly flammable as it failed to ignite in the preliminary screening test.

Endpoint:
substances / mixtures which in contact with water emit flammable gases
Data waiving:
study scientifically not necessary / other information available
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
the study does not need to be conducted because the substance is known to be soluble in water to form a stable mixture
Endpoint:
pyrophoric liquids
Data waiving:
study scientifically not necessary / other information available
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

Description of key information

Flammability [ATMP-xNH4]: non-flammable

Key value for chemical safety assessment

Additional information

The substance is only commercially available as aqueous solutions. The substances are involatile and are expected to undergo thermal decomposition. The requirement to test the substance for pyrophoricity and flammability in contact with water was waived in accordance with Section 1 of REACH Annex IX, because there is no indication on the basis of structure and experience in use and handling that the substance is pyrophoric (flammable in contact with air) or flammable in contact with water.

 

ATMP-H has been determined not to be flammable as it failed to ignite in the preliminary screening test using method A.10 flammability of solids. This result was read-across to ATMP-xNH4. The salts are not expected to exhibit higher flammable properties than their corresponding parent acids.

ATMP may give off toxic/flammable vapours of phosphine, phosphoric acid, NOx and/or POx if heated above 200°C to decomposition.

Justification for classification or non-classification

ATMP-xNH4 is not classified for flammability based on read-across from the parent acid. ATMP-H failed to ignite in preliminary screening study performed in accordance with EU Test Method A.10.