m-Cresol - ipcs inchem

OECD SIDS
p-CRESOL
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 106-44-5
DATE: 24.05.2004
GLP :
Test substance : other TS: p-cresol, no purity reported
Remark : With a OH radical concentration of 1 000 000 molec/cm3, the
half-life is 4.1 h
Result : K[OH] = 4.7 [10E-11 cm3 molecule-1 s-1]
K[NO3] = 1.07 [10E-11 cm3 molecule-1 s-1]
K[O3] = 4.7 [10E-19 cm3 molecule-1 s-1]
Reliability : (1) valid without restriction
Critical review, evaluation of all available experimental
data
Flag : Critical study for SIDS endpoint
07.05.2004 (22) (23) (24)
Type : water
Light source :
Light spectrum : nm
Relative intensity : based on intensity of sunlight
Conc. of substance : at 19 °C
Deg. product :
Method :
Year : 1987
GLP : no data
Test substance : other TS: p-cresol, no purity reported, but of highest commercial purity
available
Method : Determination of rate constant for reaction with singlet
oxigen
Result : INDIRECT PHOTOLYSIS:
- Rate constant: 1.1 E7 M-1 s-1 at pH 8.3
2.4 E7 M-1 s-1 at pH 8.8
1.6 E8 M-1 s-1 at pH 10
3.5 E8 M-1 s-1 at pH 11.5
- Half life t1/2: 500 h under noon summer sunlight
(Switzerland) with 4E-14 M singlet oxygen
Test condition : - Test medium: aqueous solution containing 0.05M phosphate
buffer and 5 mg/l rose bengal
- Test system: merry-go-round reactor
- Concentration of test substance: < 0.0001 M
Duration: < 2 hours
Reliability : (2) valid with restrictions
Study in accordance with generally accepted scientific
standards and described in sufficient detail
Flag : Critical study for SIDS endpoint
10.05.2004 (16)
Type : air
Light source :
Light spectrum : nm
Relative intensity : based on intensity of sunlight
INDIRECT PHOTOLYSIS
Sensitizer : OH
Conc. of sensitizer :
Rate constant : cm³/(molecule*sec)
Degradation : % after
Deg. product :
Method : other (measured)
Year : 1990
GLP : no data
Test substance : other TS: p-cresol, purity > 99 % (obtained from Aldrich Chemical
Company)
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