Registration Dossier
Registration Dossier
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EC number: 204-646-6 | CAS number: 123-72-8
Endpoint summary
Administrative data
Description of key information
- Water, soil - air
- Soil - water
5.4 Transport and distribution
The Henry's Law constant for n-Butyraldehyde, as predicted by EPIWIN v.3.10 ranges from 1.20 to 1.48 x 10-4atm*m3/mole, indicating that volatilization from water will occur.
A measured Henry's Law constant is reported to be 1.15 x 10-4atm*m3/mole.
Based on the Henry’s law constant (1.2 x 10-4atm*m3/mole), vapor pressure, and water solubility, the estimated volatilization half-life for n-Butyraldehyde from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec) is estimated as approximately 5 to 9 h. The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec) is estimated as approximately 5.3 d. Volatilization half-life from a model environmental pond (2 m deep) can be estimated to be about 4 d.
Volatilization of n-Butyraldehyde from dry soil surfaces is likely to exist, based upon a vapor pressure of 111 mm Hg.
Estimated of Koc values of 5.096 indicates high to very high soil mobility.
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Additional information
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