Registration Dossier
Registration Dossier
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EC number: 222-852-4 | CAS number: 3634-83-1
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
As the substance reacts with water the hydrolysis study was not performed.
Based on a weight of evidence, the half-life of XDI in water is considered to be significantly less than 12 hours.
Key value for chemical safety assessment
Additional information
As the substance XDI is a diisocyanate, it reacts with water. Isocyanates hydrolyze readily in water to yield a carbamic acid, which decarboxylates to produce CO2 and an amine (XDA); the latter can immediately react with more isocyanate to yield a disubstituted urea. The hydrolysis rate increases with electron-withdrawing substituents. Steric hindrance also influences hydrolysis rate. Even at low pHs, hydrolysis Half-Life < 10 minutes (25 deg C) have been found for isocyanates (from Ullmann's Encyclopedia).
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