| Chemical |
m-xylene |
| CAS-number : |
108-38-3 |
| |
| Synonyms : |
| 1,3-dimethylbenzene |
| m-ksyleeni |
| |
| Sumformula of the chemical : |
| C8H10 |
| EINECS-number : |
| 2035763 |
| |
| Uses : |
Intermediate.
|
| |
| State and appearance : |
colourless liquid
|
| |
| Molecular weight : |
106.18 |
| |
| Vapor pressure, mmHg : |
| 6 |
20°C |
| |
| Melting point, °C : |
| -48 |
-48/-53 |
| -53 |
|
| |
| Boiling point, °C : |
| 139 |
|
| |
| Log octanol/water coefficient, log Pow : |
| 3.2 |
Anon 1988 |
| 3.15 |
Schwarzenbach et al. 1983 |
| 3.2 |
Sangster 1989 |
| |
-- |
| 3.09 |
3.09-3.20, experimental |
| 3.2 |
LOGKOW 1994 |
| |
| Log soil sorption coefficient, log Kom : |
| 2.26 |
observed, Sabljic 1987 |
| 2.53 |
calculated, Sabljic 1987 |
| |
| Henry's law constant, Pa x m3/mol : |
| 530 |
Anon 1988 |
| 675 |
calc. Yaws et al. 1991 |
| |
| Mobility : |
Equilibrium distribution:
mass %
air 99.33
water 0.54
solid 0.13
(Anon 1988)
|
| |
| Photochemical degradation in air : |
Photooxidation half-life in air:
1.1d - 2.6hr, based upon measured rate data for vapor phase
reaction with hydroxyl radicals in air (Howard 1991).
|
| |
| Photochemical degradation in water : |
Photooxidation half-life in water:
27473yr - 550yr, scientific judgement based upon estimated rate
data for alkylperoxyl radicals in aqueous solution (Howard
1991).
|
| |
| Chemical oxygen demand, g O2/g : |
| 2.62 |
5 days, Bridie et al. 1979 |
| |
| Biochemical oxygen demand, g O2/g : |
| 2.53 |
5 days, Bridie et al. 1979 |
| |
| Half-life in air, days : |
| 0.062 |
1.5 hr, estimated, under photochemical |
| |
smog conditions in England (Verschueren |
| |
1983). |
| |
-- |
| 1.1 |
1.1d - 2.6hr, |
| 0.108 |
based upon photooxidation half-life in air. |
| |
Howard 1991 |
| |
| Half-life in soil, days : |
| 28 |
4w - 1w, |
| 7 |
scientific judgement based upon estimated aqueous aerobic biodegradation half-life. |
| |
Howard 1991 |
| |
| Half-life in water, days : |
| 28 |
4w - 1w, |
| 7 |
in surface water: scientific judgement based upon estimated aqueous aerobic biodegradation half-life. |
| |
Howard 1991 |
| |
| Aerobic degradation in water : |
Aerobic half-life:
4w - 1w, scientific judgement based upon soil column study
simulating an aerobic river/groundwater infiltration system and
aqueous screening test data (Howard 1991).
|
| |
| Anaerobic degradation in water : |
Anaerobic half-life:
16w - 4w, scientific judgement based upon unacclimated aqueous
aerobic biodegradation half-life (Howard 1991).
|
| |
| Total degradation in water : |
Biodegradation: 100 % after 192 hr (13 °C), incubation in the
groundwater (natural flora) - in the presence of the other
components of high-octane gasoline (0.100 ml/l) (Verschueren
1983).
|
| |
| Other information of degradation : |
Degradation of m-xylene:
*------------------------------------------------------------*
ENVIRONMENT INIT.CONC REDOX- TEMP DEGRADATION REF
mg/l COND. °C %/day
*------------------------------------------------------------*
water 0.312 aerobic - 61/17 a
groundwater 0.0032 aerobic 13 100/8 b
groundwater 10 aerobic 10 100/7 c
soil 0.000062 aerobic 20 0/14 d
soil (adapted) appr. 40 nitrate reducing 30 80/8 e
soil 0.0002 aerobic 20 100/1 f
soil 0.5 nitrate reducing 20 100/20 f
*-------------------------------------------------------------*
a) Battermann 1984 d) Hutchins & Ward 1984
b) Jamison et al. 1978 e) Zeyer et al. 1986
c) Kappeler & Whurman 1978 f) Kuhn et al. 1985
(Anon. 1987b).
|
| |
| Bioconcentration factor, fishes : |
| 23.6 |
Anguilla japonica, Verschueren 1983 |
| |
| LD50 values to mammals in oral exposure, mg/kg : |
| 5000 |
orl-rat, Lewis & Sweet 1984 |
| |
| LD50 values to mammals in non-oral exposure , mg/kg : |
| 14100 |
skn-rbt, Lewis & Sweet 1984 |
| |
| LCLo values to mammals in inhalation exposure, ppm : |
| 2010 |
24 hr, ihl-mus, Lewis & Sweet 1984 |
| |
| TCLo values to mammals in inhalation exposure, mg/kg : |
| 424 |
6hr/6d, ihl-man, Lewis & Sweet 1984 |
| |
| Maximum longterm immission concentration in air for plants,mg/m3 : |
| 20 |
VDI 2306 |
| |
| Maximum longterm immission concentration in air for plants,ppm : |
| 5 |
VDI 2306 |
| |
| EC50 values to algae, mg/l : |
| 4.9 |
72hr,grw, Selenastrum capricornutum |
| 3.9 |
8d,grw, Selenastrum capricornutum |
| |
AQUIRE 1994 |
| |
| LC50 values to fishes, mg/l : |
| 38 |
14 d, Poelicia reticulata |
| 9.2 |
96 hr, Micropterus salmoides, Könemann |
| |
1979 |
| |
-- |
| 16 |
24hr, Carassius auratus, Anon. 1975 |
| |
-- |
| 16 |
96 hr, Pimephales promelas, Geiger et al. 1990 |
| |
| EC50 values to fishes, mg/l : |
| 14.8 |
96 hr, mbt, Pimephales promelas, Geiger et al. 1990 |
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| 62 | Anon. 1975.
Shell Chemie, Shell Industrie Chemicalien
gids, Shell Nederland Chemie, Afd.
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Wassenaarseweg 80, 'sGravenhage, Nederland. |
| 2333 | Anon. 1987b.
Nedbrydelighed af miljøfremmede organiske stoffer.
Utredningsrapport U1.
Lossepladsprojektet. |
| 3107 | AQUIRE 1993 -.
Aquatic Toxity Information Retrieval Database.
U.S.Environmental Protection Agency, Office of Pesticides and
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|
| 2336 | Battermann, G. 1984.
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Inq.
Tech. 56: 926 - 928. |
| 1680 | Bridie, A.L., Wolff, C.J.M. & Winter, M. 1979.
BOD and COD of
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Water Res. 13: 627 - 630. |
| 3297 | Geiger, D.
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|
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| 1873 | Jamison.
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Biodegradation of high-octane gasoline.
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Sharpley and
A.M.
Kaplan (eds.).
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196. |
| 2339 | Kappeler, T. & Whurman, K. 1978.
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Bioassays with pure
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|
| 761 | Könemann, W.H. 1979.
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|
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| 1599 | VDI 2306.
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| 3030 | Yaws, C., Yang, H-C. & Pan, X. 1991.
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