Registration Dossier
Registration Dossier
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EC number: 203-862-8 | CAS number: 111-36-4
Endpoint summary
Administrative data
Description of key information
Additional information
Stability
The phototransformation of butyl isocyanate was estimated by the means of AOPWIN program v1.91 assuming 24 h per day and an OH radical concentration of 0.5 E6 molcecules/cm³. A dissipation half life of 4 days was derived.
n-Butyl isocyanate is not stable in aqueous media rapidly hydrolysing under the formation of CO2 and the water soluble hydrolysis products n-butylamine and di-n-butylurea. At time 0 (6 min after preparation of test solution) n-butylisocyanate was decomposed completely. Therefore, the half-life of n-butylisocyanate in aqueous media is less than 6 min.
Biodegradation
n-Butyl isocyanate is readily biodegradable. After 20 days 62 % (based on ThOD) of the test substance had been degraded in a closed bottle test.
Bioaccumulation
1-isocyanatobutane is calculated by a BCF of 10.96. But this value has to be considered only of theoretical interest since the substance rapidly hydrolysis.
Transport and Distribution
1-isocyanatobutane has a Koc of 274.7. But that value has to be considered of theoretical interest, since the substance rapidly hydrolysis.
The calculated Henrys Law Constant of butyl isocyanate is 219 Pa m³/mol (Bond Method) without considering the rapid hydrolysis of the substance.
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