Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

In aqueous solution, AH-salt rapidly dissociates to Adipic acid (CAS: 124 -04 -9) and 1.6 Hexamethylenediamine (CAS: 124 -09 -4). Both dissociation products are acute harmful to aquatic organisms with effect concentrations ranging from approximately 10 to 100 mg/l, respectively. For AH-salt, acute toxicity studies are available for fish, daphnia and algae and by thereby comprising three trophic levels. The less sensitive organism group is fish with an LC50 (96h) > 470 mg/l as reported for Rainbow trout and Bluegill (ABC Laboratories 1981). For the green alga Scenedesmus subspicatus a EµC50 (72h) of 537.8 mg/l and a NOEC (72h) of 125 mg/l were determined (BASF AG 1987; ECT 2010). The most sensitive organism is Daphnia magna, exhibiting an EC50 (48h) of 90 mg/l (ABC Laboratories 1981). Therefore AH-salt can be considered as acutely harmful to aquatic organisms underlining the observations on dissociation products. There are no chronic studies for fish and aquatic invertebrates available for AH-salt, however, in two reproduction tests, performed according to OECD guideline 211, no effect concentrations (NOEC) of 6.3 and 4.2 mg/l for Adipic acid (CAS: 124 -04 -9) and 1.6 Hexamethylenediamine (CAS: 124 -09 -4) were observed, clearly underlining the little hazard potential of AH-salt (MOE 1997, 2002). The lower NOEC of 4.2 mg/l for Hexamethylendiamine was used for the derivation of PNECaqua.