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Environmental fate & pathways

Distribution modelling

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Administrative data

Endpoint:
distribution modelling
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
weight of evidence
Study period:
no data
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Peer reviewed handbook and literature data

Data source

Referenceopen allclose all

Reference Type:
other: Simulation software
Title:
EXAMS II Computer Simulation
Author:
USEPA
Year:
1987
Bibliographic source:
USEPA, Washington DC, USA
Reference Type:
publication
Title:
Izvestiya Vysshikh Uchebnykh Zavednii
Author:
Linetskii VA & Serebryakov BR
Year:
1965
Bibliographic source:
Neft I Gaz 8: 62
Reference Type:
publication
Title:
Handbook of Chemical Property Estimation Methods: Environmental Behavior of Organic Compounds
Author:
Lyman WK et al.
Year:
1982
Bibliographic source:
McGraw-Hill, New York, USA

Materials and methods

Model:
other: no data
Calculation programme:
No data
Media:
other: no data

Test material

Constituent 1
Chemical structure
Reference substance name:
Methacrylonitrile
EC Number:
204-817-5
EC Name:
Methacrylonitrile
Cas Number:
126-98-7
Molecular formula:
C4H5N
IUPAC Name:
methacrylonitrile
Details on test material:
No data

Study design

Test substance input data:
Calculations were based on test substance water solubility of 25400 mg/L and a vapour pressure of 71.2 mm Hg at 25 degrees Centigrade
Environmental properties:
No data

Results and discussion

Percent distribution in media

Other distribution results:
Henry's Law constant for methacrylonitrile was estimated to be 2.47 x 10-4 atm-cu m/mole. Based on this Henry's Law constant, the volatization half-life from model river 1 m deep flowing at 1 m/s with a wind velocity of 3 m/sec was estimated to be about 5.3 h. For a model lake 1 m deep flowing at 0.05 m/s with a wind velocity of 0.5 m/s the volatilisation half-life was estimated as 4 days.

Applicant's summary and conclusion

Conclusions:
Volatilization from water surfaces is expected to be an important fate process