Also known as isobutylidene diurea, isobutyldiurea, N,N'-(2-methylpropane-1,1-diyl)diurea
Isobutylidenediurea (abbreviated IBDU) is an organic compound with the formula (CH3)2CHCH{NHC(O)NH2}2. It is a derivative of urea (OC(NH2)2), which itself is highly soluble in water, but IBDU is not. It functions as a controlled-release fertiliser owing to its low solubility, which limits the rate of its hydrolysis to urea, which is a fast-acting fertiliser.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).