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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

No data on the behavior of ammonium paratungstate in the environment are available. Hydrolysis is not a relevant process for tungsten substances, as in principle, water acts as an oxidizing agent with tungsten. Tungsten is a stable element and cannot degrade chemically, then the process of degradation is not a relevant fate pathway for tungsten substances. Furthermore, the process of biotic or abiotic biodegradation is not a relevant fate pathway for inorganic metal elements such as tungsten. Environmental data for tungsten metal and sodium tungstate are presented in the adsorption/desorption section. The soluble species (tungstate, WO42-) released are expected to be similar for each of the tungsten substances and are thus expected to behave similarly in the environment. However, the amount of soluble species resulting from tungsten metal and sodium tungstate is different, with sodium tungstate being much more soluble. Overall, data for sodium tungstate and tungsten metal are expected to adequately capture the range of mobility of ammonium paratungstate. For more details, refer to the read-across category approach description in the Category section of this IUCLID submission or Annex 3 of the CSR.

Additional information

No data on the behavior of ammonium paratungstate in the environment are available. However, read-across data for sodium tungstate and tungsten metal (source substances) are expected to adequately capture the range of mobility of ammonium paratungstate in the environment.