Polypropylene polybenzyl isocyanate
This article does not cite any sources. (May 2010) (Learn how and when to remove this template message)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
PPI is listed as a "hazardous agent" by the National Institutes of Health because it irritates skin and breathing passages at high concentrations. Some painters exposed to PPI and related isocyanate chemicals have developed occupational asthma. In chronic toxicity tests, mice exposed to low levels of PPI developed no side effects. Only those mice exposed to the two highest concentrations developed any lung symptoms. The two highest doses used in this study were 1.0 and 6.0 mg per cubic meter for 6 hours each day, 5 days each week for 2 years. The duration-adjusted exposure levels for these two high concentrations are equivalent to 11 ppb and 70 ppb, 24 hours/day for two years.
|This article about polymer science is a stub. You can help Wikipedia by expanding it.|