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Physical & Chemical properties

Flammability

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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 solids
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
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted between 31 March 2010 and 24 August 2010.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
yes
Key result
Test procedure:
burning rate test: preliminary screening test
Burning time:
2 min
Moisture (wt %):
1.635
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 that the Bunsen flame was applied.

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

Moisture content

Table 5.1

 

Determination A

Determination B

a) Mass of loss bottle (g)

19.8681

18.6811

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

20.8361

19.6405

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

20.8204

19.6247

Moisture content (% w/w)

1.622

1.647

Mean moisture content (% w/w)

1.635

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:

Two physico-chemical properties of the test item have been determined.

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) ofCommissionRegulation (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.

Description of key information

Flammability: Non flammable

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Sodium salts of DTPMP are involatile and are demonstrated to have high melting temperature of >450°C. 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.

 

Preliminary screening study was performed with DTPMP acid according to test method A.10 flammability of solids. The result indicate that DTPMP-H failed to ignite and no further testing was performed. Thes result is read-across to sodium salts of DTPMP as the salts are not expected to exhibit higher flammable properties than their corresponding acids.

By read across from structural analogues ATMP and HEDP, 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

Sodium salts of DTPMP are not classified for flammability based on read-across from DTPMP-acid. The substance failed to ignite in preliminary screening studies performed in accordance with EU test method A.10.