m-Cresol - ipcs inchem

OECD SIDS
p-CRESOL
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 106-44-5
DATE: 24.05.2004
Year : 1981
GLP : no
Test substance : other TS: p-cresol, no purity reported
Deg. products : 74-82-8 200-812-7 methane
Method : primary anaerobic sludge from 12 treatment plants receiving
mainly domestic waste water 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:
degradation ranged from 62 to 101% in 11 sludges (lag times
for approx. 20% of theoretical CH4 production: 2-5 weeks;
insufficient data for 1 sludge
secondary sludges:
degradation was 51% after 4 weeks lag-phase with the first
sludge and 121% after 3 weeks lag-phase 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 (45)
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: p-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 62-101%
Test condition : incubation for 8 w at 35 degrees C
Reliability : (2) valid with restrictions
Study in accordance with generally accepted scientific
standards and described in sufficient detail
Flag : Critical study for SIDS endpoint
07.05.2004 (46)
Type : anaerobic
Inoculum : anaerobic sludge
Concentration : 50 mg/l related to DOC (Dissolved Organic Carbon)
related to
UNEP PUBLICATIONS 207