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Environmental fate & pathways

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A test on ready biodegradability was conducted comparable to OECD Guideline 301 B (CO2 -Evolution Test). After 32 days, IPPD showed 18.9 % degradation. Therefore IPPD is not readily biodegradable (Monsanto, 1979).

Environmental fate screening (river-die-away-test) of IPPD for biological and chemical transformations was carried out in Mississippi River water (active and sterile) and purified water at an initial concentration of 1000 µg/L. Half-lives for IPPD ranged from 2 to 11 hours (Monsanto, 1981). These results only reflect the primary degradation of the substance. However, degradation in natural Mississippi water was significantly enhanced compared to sterile waters indicating that trace elements and biodegradation may play a role.