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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Phototransformation in water

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Administrative data

Link to relevant study record(s)

Description of key information

No requirement under REACh.

Key value for chemical safety assessment

Additional information

In the aqueous environment or with soil moisture, the substance dissociates rapidly to adipic acid (CAS No: 124-04-9) and 1,6-Hexametylenediamine, (CAS No: 124 -09 -4). Therefore, degradation by photolytic processes in soil or water is not expected to be of relevance. Data on the oxidation of adipic acid and hexylamine by OH radicals in aqueous solutions are available (Buxton et al. 1988). Therefore, oxidative photochemical degradation of AH salt in aqueous solution can be expected. With a OH radical concentration of 6 · 10-17 mol/l (Mill 1999), photochemical half-lives of 67 days for adipic acid and 10 days for 1-hexylamine (data for 1,6-hexandiamine not available), respectively, can be estimated. In comparison to its biodegradability, however, photochemical degradation of the AH salt in the aqueous phase does not appear to be relevant. Furthermore, studies on the phototransformation in water or soil are not required for a registration under REACh.