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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

There is no biodegradation study for "Reaction products of 3-methylbutanal and 3-methylbut-3-en-1-ol, distillation overheads, acid-treated, hydrogenated" available. Thus, the hazard assessment is based on both main components of the Reaction products. For 2H-Pyran, tetrahydro-4-methyl-2-(2-methylpropyl)- (CAS 13477-62-8; 30 -80% of the Reaction product) a study of a analog substance (CAS 16409-43-1) has been used. The biodegradability of this analog substance was tested in a Manometric Respiratory Test according to OECD Guideline 301F under GLP conditions. The substance was incubated for 28 days and a degradation rate of 79 % based on O2 consumption was determined (Givaudan, 2012).

For the second main component 2H-pyran-4 -ol (CAS 63500-71-0; 10 -60% of reaction product) a guideline study was accomplished according to OECD guideline 301B. A degradation rate less than 10 % degradation was detected based on CO2 evolution after an incubation time of 28 days (Unilever Research UK, 1993). Thus the substance is poorly biodegradable.

Based on the assessment of both main components, the biodegradability of "Reaction products of 3-methylbutanal and 3-methylbut-3-en-1-ol, distillation overheads, acid-treated, hydrogenated" is considered not readily biodegradable as a worst-case assumption.