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EC number: 609-530-2
CAS number: 38172-91-7
- Deviation of degree of biodegradation of the test substance at the end
of exposure was <20%.
- Degree of biodegradation of the reference substance was >70% DOC after
- Degree of biodegradation in the inhibition control was >35 % DOC after
The substance is readily biodegradable according to OECD criteria.
ready biodegradability of ‘2-Propyn-1-ol, compound with methyloxirane’
was tested in a GLP guideline study according to OECD 301 A (Ready
Biodegradability: DOC Die Away Test). Based on DOC removal 90 - 100%
biodegradation of the substance observed after 21 days by domestic
activated sludge from a municipal sewage treatment plant [BASF SE,
2012]. Hence, the substance can be considered as ready biodegradable. This
result is supported by an inherent biodegradability study, which was
conducted according to OECD Guideline 302 B (Inherent biodegradability:
Zahn-Wellens/EMPA Test). Based on DOC removal 90 - 100% biodegradation
of the substance was observed after 18 days by industrial activated
sludge [BASF AG, 1987].
studies on biodegradation under marine environmental conditions are
available. One study was conducted under GLP conditions in accordance
with ISO 16221 (Guidance for the determination of biodegradability in
the marine environment). Based on the CO2 evolution < 10% biodegradation
were observed after 28 days by marine microorganisms [BASF SE, 2004].
However, a newer study performed according to OECD guideline 306 and GLP
show 74% degradation after an incubation time of 63 days. This study
clearly indicate the biodegradfability of the substance in the marine
environment. The longer lag phase is based on the much lower
microorganism concentration given in marine water.
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