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Environmental fate & pathways


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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