Registration Dossier
Registration Dossier
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EC number: 253-168-4 | CAS number: 36727-29-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Parent compound 3,5,5-trimethylhexanoyl chloride: partly/moderately
biodegradable (similar to OECD 301 C; BASF AG, 1990).
Hydrolysis product 3,5,5-trimethlyhexanoic acid: ready biodegradable
according to OECD 301 A (Harlan, 2010).
Key value for chemical safety assessment
Additional information
The biodegradability of 3,5,5-trimethylhexanoyl chloride was tested in a ready biodegradability test according to EEC Directive 79-831, Annex V, Part C (similar to OECD 301C; BASF AG, 1990). The biodegradation reached 32% after 38 days. Therefore, the substance is considered moderately/partly biodegradable.
The ready biodegradability of the hydrolysis product 3,5,5-trimethylhexanoic acid was tested according to OECD 301A (DOC Die-Away Test). Non-adapted activated sludge from a wastewater treatment plant receiving predominantely domestic sewage was used as inoculum. Biodegradation was monitored as DOC removal. After 21 d, the mean biodegradation of the test item 3,5,5-trimethylhexanoic acid based on DOC was 96 %. In conclusion, the test item 3,5,5-trimethylhexanoic acid can be classified as readily biodegradable under the test conditions.
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