m-Cresol - ipcs inchem

OECD SIDS
p-CRESOL
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 106-44-5
DATE: 24.05.2004
measurement of 14CO2 radioactivity
Reliability : (2) valid with restrictions
No standard procedure but in accordance with generally accepted scientific
standards and described in sufficient detail
Flag : Critical study for SIDS endpoint
24.05.2004 (42)
Type : aerobic
Inoculum : activated sludge, industrial
Contact time :
Degradation : = 100 (±) % after 10 day(s)
Result : inherently biodegradable
Deg. product :
Method : OECD Guide-line 302 B "Inherent biodegradability: Modified Zahn-Wellens
Test"
Year : 1990
GLP : no data
Test substance : other TS: p-cresol, no purity reported
Result : 90 % degradation during the log-phase (8 days)
Test condition : Test substance conc. 50-400 mg/l DOC, 200-1000 mg/l COD
acclimatization phase 2 days
Reliability : (2) valid with restrictions
Guideline study, basic data given
Flag : Critical study for SIDS endpoint
24.05.2004 (43)
Type : aerobic
Inoculum : activated sludge, adapted
Concentration : 200 mg/l related to COD (Chemical Oxygen Demand)
related to
Contact time :
Degradation : = 96 (±) % after 5 day(s)
Result : inherently biodegradable
Deg. product :
Method : other: batch system (similar to OECD 302B "Zahn-Wellens-Test")
Year : 1976
GLP : no data
Test substance : other TS: p-cresol, no purity reported
Method : - Test compound was sole source of carbon
- Inoculum density: 100 mg dry matter/l; gradual increase of TS
concentration during 20 days adaptation period
- COD measured
- With volatile substances a test without inocculum was done to
differentiate the actual biological degradation from the losses due to mere
volatilization
Result : Initial degradation rate: 55.0 mg COD/g/h
Test condition : 20 +/-3 degree C; pH 7.2; mineral salts medium; dark;
continuously stirred
Reliability : (2) valid with restrictions
Test procedure comparable to standard method and in
accordance with generally accepted scientific standards;
basic data given
Flag : Critical study for SIDS endpoint
24.05.2004 (44)
Type : anaerobic
Inoculum : anaerobic sludge
Deg. product : yes
Method :
206
UNEP PUBLICATIONS