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Environmental fate & pathways

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Administrative data

Endpoint:
other distribution data
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Limited information available

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
1981
Reference Type:
review article or handbook
Title:
Handbook of Environmental Fate and Exposure Data for Organic Chemicals.
Author:
Howard, P.H.
Year:
1993
Bibliographic source:
Volume IV. Solvents 2. Lewis Publishers, London.
Reference Type:
other company data
Title:
Unnamed
Year:
1992

Materials and methods

Principles of method if other than guideline:
No information available
GLP compliance:
not specified
Type of study:
volatility
Media:
water - air

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

Based on the value of Henry's Law Constant (2.6 x 10-5 m3 atm/mole) volatilization is probably significant for surface water, although the rate may be slow. A volatilization half-life of 21 hours would be predicted for a 1 m deep river flowing at 1 m/sec, if the wind speed was 3 m/sec. Volatilization would become particularly important as a loss process in shallow waters (Howard, 1993; IPCS, 1992). Volatilization half-lives (first order kinetics) have been predicted from Henry's Law Constant using the EXAMS computer simulation: pond water 11 days river water 6 days oligotrophic lake 34 days eutrophic lake 36 days (Burns et al. 1981).

Volatilization half-lives (first order kinetics) have been predicted from Henry's Law Constant using the EXAMS computer

simulation:

       pond water         11 days

       river water        6 days

       oligotrophic lake  34 days

       eutrophic lake     36 days

                           (Burns et al. 1981).

Applicant's summary and conclusion

Executive summary:

Based on the value of Henry's Law Constant (2.6 x 10-5 m3 atm/mole) volatilization is probably significant for surface water, although the rate may be slow. A volatilization half-life of 21 hours would be predicted for a 1 m deep river flowing at 1 m/sec, if the wind speed was 3 m/sec. Volatilization would become particularly important as a loss process in shallow waters (Howard, 1993; IPCS, 1992). Volatilization half-lives (first order kinetics) have been predicted from Henry's Law Constant using the EXAMS computer simulation: pond water 11 days river water 6 days oligotrophic lake 34 days eutrophic lake 36 days (Burns et al. 1981).