m-Cresol - ipcs inchem

OECD SIDS
m-CRESOL
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 108-39-4
DATE: 24.05.2004
Inoculum : anaerobic sludge
Deg. product : yes
Method :
Year : 1981
GLP : no
Test substance : other TS: m-cresol, no purity reported
Deg. products : 74-82-8 200-812-7 methane
Method : primary anaerobic sludge from 12 treatment plants receiving
mainly domestic wastewater were diluted to
10 % in a mineral salts medium, test substance
concentration: 30 mg/l; secondary anaerobic sludge from 2
treatment plants diluted to 10 % in a mineral salts medium,
test substance: 50 mg/l;
incubation for 8 weeks; triplicate samples
Result : primary sludges:
no degradation was observed in 4 sludges; degradation ranged from 55 to
103 % in 6 sludges (lag times for approx 20 % of theoretical CH4
production: 4-6 weeks); insufficient data for 2 sludges.
secondary sludge:
degradation was 92% after 4 weeks with the first sludge and
90% after 5 weeks with the second (degradation related to
theoretical methane and CO2 production)
Test condition : 35 degrees C, due to storage of sludges before incubation, lag phase of
methanogenesis could be increased in some sludges
Reliability : (2) valid with restrictions
Test procedure comparable to standard method and in
accordance with generally accepted scientific standards;
detailed documentation of test procedure and test conditions
Flag : Critical study for SIDS endpoint
07.05.2004 (37)
Type : anaerobic
Inoculum : anaerobic sludge
Concentration : 50 mg/l related to DOC (Dissolved Organic Carbon)
related to
Contact time : 56 day(s)
Degradation : (±) % after
Result :
Deg. product : yes
Method :
Year : 1984
GLP : no
Test substance : other TS: m-cresol, no purity reported
Deg. products : 74-82-8 200-812-7 methane
Method : primary and secondary anaerobic sewage sludge from 9
treatment plants diluted to 10 % in a mineral salts medium;
degradation measured as gas pressure increase
Remark : data have been published by the authors as a NTIS-study (previous data
set)
Result : in 2 different secondary sludges >75% degradation
in 9 different primary sludges degradation 0-103%
Test condition : incubation for 8 w at 35 degrees C
Reliability : (2) valid with restrictions
Test procedure comparable to standard method and in
accordance with generally accepted scientific standards;
sufficient documentation
Flag : Critical study for SIDS endpoint
07.05.2004 (38)
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