Appendix D - Dossier (PDF) - Tera

date: 20–JUL–2005
3. Environmental Fate and Pathways Substance ID: 71–43–2
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3.1.1 Photodegradation
Type: air
Light source: other
Conc. of subst.: at 24 degree C
INDIRECT PHOTOLYSIS
Sensitizer: O3
Conc. of sens.: 3000000000000 molecule/cm³
Rate constant: = .0000000000000000000001 cm³/(molecule * sec)
Degradation: = 50 % after 105 year
Method: other (calculated)
GLP: no data
Test substance: no data
Result: In an urban atmosphere, the half–life for the reaction of
benzene with ozone was calculated to be 105 years. In a
rural atmosphere, the half–life was found to be 327 years,
using an atmospheric concentration for ozone of 9.6 x 10+11
molecules/cm3. Consideration of the reaction with ozone in
isolation from other sensitizer species is not a realistic
scenario for benzene atmospheric fate.
Source: BP Chemicals Ltd LONDON
German Rapporteur
Test condition: The light source was chemiluminescence. The rate constant
used was that of Pate C.T. et al. J. envir. Sci. Hlth A11,
1–10, 1976 and the sensitizer concentration that of Lyman
W.J. et al. Handbook of Chemical Property Estimation
Methods: Environmental Behaviour of Organic Compounds.
McGraw–Hill Book Company, New York, 1982.
Reliability: (4) not assignable
15–MAR–2004 (54) (184)
Type: air
Conc. of subst.: .013 mg/l
INDIRECT PHOTOLYSIS
Sensitizer: O3
Conc. of sens.: .001 mg/l
Method: other (measured)
GLP: no data
Test substance: no data
Result: Very little aerosol was formed when benzene reacted with
ozone in the dark.
Source: BP Chemicals Ltd LONDON
German Rapporteur
Test condition: A light scattering photometer was used. No further details
were available.
Reliability: (4) not assignable
15–MAR–2004 (184) (447)
Appendix D: Benzene SIDS Dossier
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