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Physical & Chemical properties

Flammability

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Endpoint:
flammable solids
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
The salts are produced from the parent acid; [Hexane-1,6-diylbis[nitrilo(methylene)]]tetrakisphos-phonic acid. The read-across is therefore based on the presence of common functional groups in both the acid and the salt. The impurity profile of the salt is expected to be similar to that of the parent acid since the salt is prepared from the acid.
Reason / purpose:
read-across source
Test procedure:
ignition time on contact with air
Remarks on result:
no ignition on contact with air (not further specified)
Test procedure:
ignition time on contact with air
Remarks on result:
no ignition on contact with air (not further specified)
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Between 21 June 2012 and 02 October 2012.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
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, done to a valid guideline and the study was conducted under GLP conditions, however no formal claim of GLP compliance was made.
Qualifier:
according to
Guideline:
EU Method A.10 (Flammability (Solids))
Deviations:
no
GLP compliance:
no
Key result
Test procedure:
ignition time on contact with air
Remarks on result:
no ignition on contact with air (not further specified)
Key result
Test procedure:
ignition time on contact with air
Remarks on result:
no ignition on contact with air (not further specified)

  

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:
other: Not highly flammable.
Conclusions:
The test item has been determined to be not highly flammable as it failed to ignite in the preliminary screening test.
Executive summary:

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: non-flammable

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

The substance is only commercially available as aqueous solutions. The substances are involatile and (are demonstrated or 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.

The test item 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 from the acid. The salts are not expected to exhibit higher flammable properties than their corresponding acids. The potassium salt of the substance was reported as not flammable in a secondary source to which no reliability could be assigned.

Justification for classification or non-classification

The substance is not classified for flammability as no ignition was observed during the study conducted in accordance to EU Method A.10.