m-Cresol - ipcs inchem

OECD SIDS
p-CRESOL
3. ENVIRONMENTAL FATE AND PATHWAYS ID: 106-44-5
DATE: 24.05.2004
Test procedure in accordance with generally accepted
scientific standards; detailed documentation of test
procedure and test conditions
10.05.2004 (27) (28)
Type : water
Light source :
Light spectrum : nm
Relative intensity : based on intensity of sunlight
Deg. product : not measured
Method : other (measured)
Year : 1995
GLP : no data
Test substance : other TS: p-cresol, purity commercial, vacuum distilled
Method : Determination of the photosensitized oxidation in water
- Merry-go-round photoreactor DEMA (Hans Mangels GmbH, Bornheimroisdorf,
Germany) Model 125
- Light source: 700 W Hanau TQ718 medium pressure mercury lamp,
equipped with cut-off filter: lambda > 320 nm
- Temperature 25 °C
- Photon fluence density 1.7 mEinstein m-2 s-1 at 366 nm
- Chemical analysis by HPLC, quantification at 285 nm
Result : K = 0.0004 s-1
direct photolysis (in the absence of sensitizer) was
negligible
Test condition : - Test system: merry-go-round photoreactor
- Concentration of test substance: 2.5 µM
- Concentration of sensitizer: humic acid (DOC = 1.65 mg/l)
- temperature: 25 degrees C
Reliability : (3) invalid
Quantification of environmental reaction rate not possible
10.05.2004 (29)
Type : water
Light source : Sun light
Light spectrum : 290 nm
Relative intensity : based on intensity of sunlight
Conc. of substance : 1 mg/l at °C
Deg. product :
Method : other (measured)
Year : 1978
GLP : no
Test substance : other TS: m-cresol, no purity reported by Choudry
Method : Determination of rate constants for photolysis in aqueous
solution in the absence and presence of humic acids
Result : A photolysis halflife of 35 days was determined, while with
addition of 9.5 ug/l humic acid the half-life was 3 days.
The authors report computer simulated estimated half-lives for different
compartments (river: 200 d, eutrophic pond: > 400 d, eutrophic lake > 400
d, oligotrophic lake 100 d)
Test condition : Sunlight, in April (mostly overcast)
pure water, with and without humic acid (9.5 ug/ml)
tubes held in rack at 60 ° angle to the horizon
Reliability : (2) valid with restrictions
Basic data given
10.05.2004 (30) (31)
Type : water
200
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