m-Cresol - ipcs inchem

OECD SIDS
p-CRESOL
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 106-44-5
DATE: 24.05.2004
Method : Seawater from California (USA) supplemented with 100, 500,
and 1000 µg/l test substance. Analysis of subsamples with
GC/MS
Result : t1/2 = 295 h (100 µg/l)
t1/2 = 215 h (500 µg/l)
t1/2 = 325 h (1000 µg/l)
Doubling time of population
85 h (100 µg/l)
40 h (500 µg/l)
31 h (1000 µg/l)
Test condition : Temp. 20+-2 degrees C
Reliability : (2) valid with restrictions
No standard test procedure, but in accordance with generally
accepted scientific standards and described in sufficient
detail
24.05.2004 (50)
Type : aerobic
Inoculum : other: mixed microbial cultures
Concentration : 1.6 mg/l related to Test substance
3.2 mg/l related to Test substance
Contact time : 8 day(s)
Degradation : (±) % after
Result :
Deg. product :
Method : other: APHA method (1980)
Year : 1988
GLP : no
Test substance : other TS: p-cresol, no purity reported
Method : BOD technique; determination of the degradation rate
constant which is compared with those reported for natural
waters
Result : Pseudo-first-order rate constants (1/h):
Degradation of p-cresol in BOD test solution 0.028
Degradation of p-cresol in 5 natural waters 0.025 - 0.106 (mean 0.063)
For comparison:
Degradation of phenol in BOD test solution 0.020
Degradation of phenol in 5 natural waters 0.046 - 0.110 (mean 0.075)
p-Cresol is nearly as biodegradable as phenol.
Test condition : 2.3 E8 cells/ml; 21 degrees C
Reliability : (2) valid with restrictions
No standard test procedure, but in accordance with generally accepted
scientific standards and described in sufficient detail
10.05.2004 (51)
Type : aerobic
Inoculum : other: mixed microbial cultures
Concentration : 1.6 mg/l related to Test substance
3.2 mg/l related to Test substance
Deg. product :
Method : other: BOD technique
Year : 1989
GLP : no
Test substance : other TS: p-cresol, no purity reported
Method : study targets to determine the effect of inoculum
density on biodegradation rate; BOD technique
Result : degradation rate was nearly independent on biomass
concentration. First order rate constant 3.4 (+/- 0.24) x 10-1/day with 2.3
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