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EC number: 905-806-4
CAS number: -
No long-term fish toxicity tests are available for the test substance. It appears appropriate to waive this study.
The test substances of the methylenediphenyl isocyanate (MDI) category
react quickly with water and hence will be rapidly hydrolysed in contact
with aqueous media (T1/2 = 20h). However, MDI is hydrophobic and poorly
soluble in water and thus the heterogeneous reaction with water or soil
is less rapid. The major product of such a reaction is a solid,
insoluble polyurea. Under conditions typical of many types of
environmental contact, i. e. with relatively poor dispersion of the
denser isocyanate, the interfacial reaction leads to the formation of a
solid crust encasing partially or unreacted material. This crust
restricts ingress of water and egress of amine, and hence slows and
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