n-Butyl isocyanate, an elimination product of benomyl, the active ingredient in Benlate formulations, reacts with water to give the symmetrical N,N'-dibutylurea and the salt of butylamine. Reaction is first order with a rate constant between 1.3×10 -4 and 8.4×10 -4 s -1 . When moist Boston fern and cucumber plants are exposed to n-butyl isocyanate; N,N'-dibutylurea is formed on or in the plants'leaves. This compound, along with N-butylformamide and N-butylacetamide, has been found in both dry flowable and wettable powder formulations of Benlate fungicide

N,N'-dibutylurea is a key component in Benlate fungicide formulations and is found on or in plants exposed to n-butyl isocyanate.

Paper

N,N'-Dibutylurea from n-Butyl Isocyanate, a Degradation Product of Benomyl. 1. Formation in Benlate Formulations and on Plants

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