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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Flammability

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Administrative data

Link to relevant study record(s)

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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 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 [HEDP-xK]: non-flammable

Key value for chemical safety assessment

Flammability:
not classified

Additional information

Salts of HEDP 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 studies were performed with HEDP acid and HEDP-4Na according to test method A.10 flammability of solids. In both cases the test material failed to ignite and no further testing was performed. These results are read-across to potassium salts of HEDP as the salts are not expected to exhibit higher flammable properties than their corresponding acids.

Justification for classification or non-classification

Potassium salts of HEDP are not classified for flammability based on read-across from HEDP-acid and HEDP-4Na. Both substances failed to ignite in preliminary screening studies performed in accordance with EU test method A.10.