Registration Dossier
Registration Dossier
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EC number: 943-366-5 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
The target substance is an UVCB substance consisting of adipic acid, di-anhydride with bis(acetic acid) (ca. 57 %), Acetic acid (ca.32.5 %), acetic anhydride (ca. 7.1 %), adipic anhydride (ca. 1.5 %) and oligomeric adipic anhydrides (ca. 1.0 %).
Acetic anhydride is unstable in water and decomposes immediately (half-life about 4 minutes) in contact with water to acetic acid/acetate. Adipic anhydrides hydrolyse also rapidly when in contact with water to adipic acid and acetic acid.
Acetic acid and adipic acid are not expected to hydrolyse since the compounds lack functional groups that hydrolyze under environmental conditions.
The half-life of acetic acid in air is calculated to be 26.7 days. The Handbook by Mackay (1993) is peer-reviewed and is considered to be reliable and suitable for use as a key study for this endpoint.
Half-life for adipic acid was estimated as 2.9 days using EPISUITE program
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