Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

Aluminium dihydrogen triphosphate (EC 237 -714 -9, CAS 13939 -25 -8) is a solid white powder. The melting point of aluminium dihydrogen triphosphate has been determined to be > 450°C and therefore a study for boiling point does not need to be conducted. The density was determined to be 378.3 g/L at 20 °C and the water solubility has been found to be < 0.00034 g/L at 20.0 ± 0.5° in un-buffered glass double-distilled water (typical final solution pH 4). Thus, aluminium dihydrogen triphosphate is considered to be slightly soluble. The granulometry data gives the following information: The particle size distribution shows that > 90% of particles were < 100 µm in diameter. Therefore, the substance is considered to be inhalable.

Overall, it can be concluded that aluminium dihydrogen triphosphate (EC 237-714-9, CAS 13939-25-8) is not considered to possess any of the following hazardous physico-chemical properties: autoflammability and/or self-ignition, flammability, explosiveness and oxidising properties.

Thus, the substance does not meet the classification criteria for physical-chemical hazard in accordance with Regulation (EC) No 1272/2008 (CLP) and the Globally Harmonized System of Classification and Labelling of Chemicals (GHS).