Determination of 1‐octanol/water partition coefficients of isocyanate compounds by an HPLC method

Yakabe, Yoshikuni; Hiromatsu, Koichi; Kawahara, Kazumi; Nakahara, Michito

doi:10.1080/02772240009358950

Cited by 1 publication

(1 citation statement)

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“…Such transfer, and the subsequent environmental fate in water or soil, is not fully amenable to multimedia modeling because of the reactivity of these compounds in the aquatic environment, 11,26 but an appreciation can be…”

Section: Discussionmentioning

confidence: 99%

Fate and Potential Environmental Effects of Methylenediphenyl Diisocyanate and Toluene Diisocyanate Released into the Atmosphere

Tury¹,

Pemberton²,

Bailey

2003

Journal of the Air & Waste Management Association

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Information from a variety of sources has been collected and summarized to facilitate an overview of the atmospheric fate and potential environmental effects of emissions of methylenediphenyl diisocyanate (MDI) or toluene diisocyanate (TDI) to the atmosphere. Atmospheric emissions of both MDI and TDI are low, both in terms of concentration and mass, because of their low volatility and the need for careful control over all aspects of their lifecycle from manufacture through disposal. Typical emission losses for TDI are 25 g/t of TDI used in slabstock foam production. MDI emission losses are lower, often less than 1 g/t of MDI used. Dispersion modeling predicts that concentrations at the fenceline or beyond are very low for typical releases. Laboratory studies show that TDI (and by analogy MDI) does not react with water in the gas phase at a significant rate. The primary degradation reaction of these aromatic diisocyanates in the atmosphere is expected to be oxidation by OH radicals with an estimated half-life of one day. Laboratory studies also show that this reaction is not expected to result in increased ground-level ozone accumulation.

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Section: Discussionmentioning

confidence: 99%