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Data bank of environmental chemicals     |     The Finnish Environment Institute (SYKE)
 


22.9.2019

Data bank of environmental properties of chemicals


Chemical
1,2,4-trimethylbenzene
CAS-number :
95-63-6
 
Sumformula of the chemical :
C9H12
EINECS-number :
2024369
 
Water solubility, mg/l :
10  < 10, MITI 1992
 
Boiling point, °C :
169  169-171, MITI 1992
 
Log octanol/water coefficient, log Pow :
3.63  Sangster 1989
 
Henry's law constant, Pa x m3/mol :
570.8  calc. Yaws et al. 1991
 
Photochemical degradation in air :
Photooxidation half-life in air:
16hr - 1.6hr, based upon measured vapor-phase photooxidation 
rate constant with OH (Howard 1991).
 
Photochemical degradation in water :
Photooxidation half-life in water:
4.9yr - 44d, based upon measured aqueous photooxidation rate 
constant with hydroxyl radicals (Howard 1991).
 
Half-life in air, days :
0.67  16hr - 1.6hr,
0.07  based upon measured photooxidation rate constant with OH.
  Howard 1991
 
Half-life in soil, days :
28  4w - 7d,
scientific judgement based upon estimated aqueous aerobic biodegradation half-lives.
  Howard 1991
 
Half-life in water, days :
28  28d - 7d,
in surface water: scientific judgement based upon estimated aqueous aerobic biodegradation half-life,
56  8w - 14d,
14  in ground water: scientific judgement based upon estimated aqueous aerobic biodegradation half-lives.
  Howard 1991
 
Aerobic degradation in water :
Aerobic half-life:
4w - 7d, intermediate degradation rate selected based upon 
scientific judgement of conflicting aqueous screening studies
Howard 1991).
 
Anaerobic degradation in water :
Anaerobic half-life:
16w - 28d, scientific judgement based upon estimated aqueous 
aerobic biodegradation half-lives (Howard 1991).
 
Total degradation in water :
Biodegradation:
4-18% by BOD
period: 28d
substance: 100 mg/l
sludge: 30 mg/l
(MITI 1992)
 
Ready biodegradability :
Confirmed to be non-biodegradable (Anon. 1987).
 
Bioconcentration factor, fishes :
33  33 - 275, 8w, Cyprinus carpio, conc 0.2 mg/l,
275 
31  31 - 207, 8w, Cyprinus carpio, conc 0.02 mg/l,
207  MITI 1992
 
Other information of bioaccumulation :
Confirmed to be non-accumulative or low accumulative (Anon.
1987).
 
LC50 values to fishes, mg/l :
18  48hr, Oryzias latipes, MITI 1992
  --
7.72  96 hr, Pimephales promelas, Geiger et al. 1986

References
1848Anon. 1987a. The list of the existing chemical substances tested on biodegradability by microorganisms or bioaccumulation in fish body by Chemicals Inspection & Testing Institute. Ministry of International Trade and Industry, MITI. Japan.
3294Geiger, D. L. et al. 1986. Acute toxicities of organic chemicals to fathead minnows (Pimephales promelas) Vol. 3. Center for Lake Superior Environmental Studies, University of Wisconsin-Superior, Superior, Wisconsin, U.S.A., 328.
3120Howard, P.H., Boethling, R.S., Jarvis, W.F., Meylan, W.M. & Michalenko, E.M., Handbook of Environmental Degradation Rates, 1991. Lewis Publicers, Inc., Chelsea, Michigan, U.S.A., pp. 725.
3105MITI 1992. Biodegradation and bioaccumulation data of existing chemicals based on the CSCL Japan. Compild under the Safety Division Basic Industries Bureau Ministry of International Trade & Industry, Japan. Edited by Chemicals Inspection & Testing Institute, Japan.
3104Sangster, J. 1989. Octanol-water partition coefficients of simple organic compounds. J. Phys. Chem. Ref. Data, Vol 18, No. 3: 1111 - 1229.
3030Yaws, C., Yang, H-C. & Pan, X. 1991. Henry's law constants for 362 organic compounds in water. Chemical Engineering. November. p 179 - 185.

 
 
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