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EC number: 215-089-3
CAS number: 1300-71-6
Study and literature data on cresols and ethylphenols show them to be readily biodegradable. Study data on xylenols show that 2,3- and 2,4-xylenol are readily biodegradable and the remaining 4 are inherently biodegradable (Pitter, 1976). Based on all available information for cresols, ethyl-phenols and xylenols the substances are described as inherently biodegradable.
m-, p- and o-Cresol is inherently degradable as shown by a test similar
to OECD guideline 302 B with a removal of 95 -96 % of m-cresol after 5
days of incubation. The degradation rates were >15
mg COD/g/h which was the criteria for being readily biodegradable.
Ethyl phenols are considered to be readily biodegradable.
The sensitivity of the test system was confirmed as the reference
substance sodium benzoate is considered to be readily biodegradable
The xylenols are inherently degradable as shown by a test similar to
OECD guideline 302 B with a removal of 89.3 -97.5 % after 5 days of
incubation . 2,3 -xylenol and 2,4 -xylenol had degradation rates >15 mg
COD/g/h which was the criteria for being readily biodegradable (Pitter
A recent 301D study (2010) on mixed xylenols showed biodegradation of 39
% in 28 days. However, this test is very stringent and it does not
necessarily mean that the substance would not biodegrade under
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