Registration Dossier
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EC number: 203-854-4 | CAS number: 111-29-5
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Pentane-1,5-diol is readily biodegradable (according to OECD criteria).
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
As there are no data on readily biodegradability available a category approach to the adjacent substances butane-1,4-diol (CAS 110 -63-4) and hexane-1,6-diol (CAS 629-11-8) is applied. Both substances are used to show, that molecules with comparable physico-chemical properties and molecular structure (diols of linear alkanes) which are prolonged or shortened by one C atom are both readily biodegradable. For both substances tests according to an OECD 301 guideline are available, stating that these diols are readily biodegradable. For butane-1,4 -diol a test performed by the Japanese Chemical Industry Ecology-Toxicology & Information Center (1992) according to OECD TG 301C is available. The study uses a mixed inoculum according to MITI guideline and results in a degradation rate of 74 -96 % after 14 days related to the BOD. For the second substance of this category approach, hexane-1,6 -diol was tested by Weytjens et al. (1994) in an OECD TG 301A DOC die-away test using domestic inoculum. After a test duration of 7 days a DOC removal > 90 % was found.
In addition, a 302B Zahn-Wellens test performed by the BASF SE (1988) using industrial inoculum finished with a DOC removal of 99% after a test period of 14 days.
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