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EC number: 905-806-4
CAS number: -
A structurally related analogue was found to be non biodegradable in a
biodegradation test according to OECD Guideline 302C (Caspers et al,
1986). There was 0% biodegradation found after 28 days.
The test substance is covered by the category approach of
methylenediphenyl diisocyanates (MDI). Hence, data of the category
substances can be used to cover this endpoint. A biodegradation
screening test in water is available for the structurally related
analogue PMDI. According to OECD Guideline 302C (Inherent
biodegradability: Modified MITI Test (II)) Caspers et al. (1986) found
0% biodegradation after 28 days based on oxygen consumption under
aerobic condtions with domestic sewage (adaptation not specified).
MDI hydrolyses very rapidly in water (Yakabe et al., 1994). Hence, this
test measured the biodegradation of the hydrolysis products of PMDI.
Based on the justification in the category approach, it is assumed that
all MDI analogues included in the category are not readily biodegradable.
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