Registration Dossier
Registration Dossier
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EC number: 218-542-3 | CAS number: 2177-70-0
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Readily biodegradable, fulfilling 10-d window criterion; OECD guideline 310 (Headspace test); GLP;
Not inhibitory to microorganisms
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The ready biodegradation of PHMA was investigated in a study conducted according to OECD Guideline 310 (Headspace Test), adopted 23 March 2006, over a period of 28 days and using predominantly domestic non-adapted activated sludge as inoculum. The biodegradation rate was determined by measurement of CO2 evolution. Inoculum blank, toxicity control and procedural/functional control with the reference substance sodium benzoate were performed.
For the functional control the pass level of 60% degradation was reached after 3 days. The biodegradation reached 90% after 28 days.
The 10% level of biodegradation of the test item was reached after 1 day. The pass level of 60% was achieved after 5 days, and the biodegradation reached 79% after 28 days. The biodegradation in the toxicity control reached 87% within 14 days and came to 81% after 28 days. The biodegradation of the reference item was not inhibited by the test item.
PHMA was readily biodegradable fulfilling the 10-d window criterion.
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