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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Hydrolysis

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Administrative data

Link to relevant study record(s)

Description of key information

The parent substance of Diquat C16-18 (N,N,N',N',N''-Pentamethyl-N-C16-18 (even numbered) C18 unsat.-alkyl-1,3-propanediammonium chloride) is biodegraded into an intermediate which has a higher solubility and lower sorption potential than the parent. Diquat C16-18 does not contain hydrolysable covalent bonds. Cleavage of a carbon-nitrogen bond under environmental conditions is only possible with a carbonyl group adjacent to the nitrogen atom. Degradation of  diquat C16-18 through hydrolysis is therefore not considered.

Key value for chemical safety assessment

Half-life for hydrolysis:
15 yr
at the temperature of:
20 °C

Additional information