Reaction mass of [[(2-hydroxyethyl)imino]bis(methylene)]bisphosphonic acid and Phosphonic acid, P-[(tetrahydro-2-hydroxy-2-oxido-4H-1,4,2-oxazaphosphorin-4-yl)methyl]-

Flammability

Link to relevant study record(s)

Reference

Reference 1

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

Reference 2

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

Reference 3

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental Starting Date: 04 September 2012; Experimental Completion Date: 05 September 2012.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

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

 

Results

Preliminary screening test

The pile failed to ignite during the 2 minutes that the Bunsen flame was applied.

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

Interpretation of results:

GHS criteria not met

Conclusions:

HEBMP-xNa has been determined to be not highly flammable as it failed to ignite in the preliminary screening test perfomed in accordance with EU Method A.10 and in compliance with GLP. The result is considered to be reliable.

Executive summary:

Test System

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 procedure 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.

Description of key information

Flammability [HEBMP-H]: not flammable

Key value for chemical safety assessment

Flammability:

not classified

Additional information

The substance is only commercially available as aqueous solutions. Substances in the HEBMP category are involatile and (are demonstrated or expected to) undergo thermal decomposition. Therefore, HEBMP-H is not expected to be flammable.

A preliminary screening study was performed with the solid form of HEBMP-xNa according to EU Test Method A.10 flammability of solids and in compliance with GLP. The test material failed to ignite and no further testing was performed (Harlan 2012). This result is read-across to HEBMP-H because the parent acid is not expected to exhibit higher flammable properties than their corresponding salts.

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.

HEBMP-H 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

HEBMP-H is not classified for flammability. HEBMP-xNa failed to ignite in preliminary screening study performed in accordance with EU test method A.10.