Registration Dossier
Registration Dossier
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EC number: 479-150-8 | CAS number: 7784-22-7
Flammability
Administrative data
Link to relevant study record(s)
Description of key information
Flammable.
Key value for chemical safety assessment
- Flammability:
- flammable
Additional information
In the preliminary test, the sample ignited with a white smog and green flame and the combustion propagates over 200 mm in less than 4 minutes. Then the full test was conducted and a mean of 20.22 seconds was calculated over six tests repeated on 100 mm pile.
Since the burning time is less than 45 seconds over six tests at 100 mm, aluminium hypophosphite can be considered as a highly flammable substance.
The test was repeated including a wetted zone after 10 cm of the starting of the flame. The wetted zone could stop the propagation of the flame.
Justification for classification or non-classification
According to the CLP Regulation (EC n. 1272/2008), 2.7 section, flammable solids, powdered, granular or pasty substances or mixtures shall be classified as readily combustible solids when the time of burning of one or more of the test runs, performed in accordance with the test method described in Part III, sub-section 33.2.1, of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, is less than 45 seconds or the rate of burning is more than 2.2 mm/s.
The substance ignites with a white smog and green flame and the combustion propagates over 100 mm in less than 5 minutes: the mean of 20.22 seconds was calculated over six replicates.
The test was repeated and it was demonstrated that a wetted zone can stop the propagation of the flame.
In conclusion, according to the CLP Regulation (EC n. 1272/2008) test substance is classified as Flammable, category 2 (Flam. Sol. 2, H228).
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