Registration Dossier
Registration Dossier
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EC number: 607-997-7 | CAS number: 26776-30-7
Endpoint summary
Administrative data
Description of key information
Additional information
2H-Azepin-2-one, hexahydro-, polymer with 1,6-diisocyanatohexane was observed to be "not readily biodegradable" (no confirmed biodegradation within 28 days) in two independent studies. The biodegradability of 2H-Azepin-2-one, hexahydro-, polymer with 1,6-diisocyanatohexane was examined in a "Manometric Respirometry Test" according to EU-Method C.4 -D and OECD 301 F (Aventis 2002). The test item was observed to be "not ready biodegradable" under the present test conditions (0% biodegradation within 28 days).
In a further test by Bayer (2007) a Manometric Respirometry Test was performed to assess the ready biodegradability of a 72 % solution of 2H-Azepin-2-one, hexahydro-, polymer with 1,6-diisocyanatohexane in 2-methoxy-1-methylethylacetate. The test item showed 22.3 % degradation after 28 days. Considering ready biodegradability of the solvent 2-methoxy-1-methylethylacetate, the observed BOD is essentially due to the solvent, i.e. no degradation of the oligomer was shown.
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