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Hazard Predictions

• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Generates heat: Exothermic reaction at ambient temperatures (releases heat)
• Toxic: Reaction products may be toxic

Isocyanates react with acidic compounds, including carboxylic acids and beta-dicarbonyl compounds, at room temperature (Richter, R.H., R.D. Priester, Jr. 2000. Isocyanates, Organic. In Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. (Online)).

Isocyanates may liberate inert CO2 gas upon exposure to carboxylic acids (Smith, P. A. S., Open-Chain Nitrogen Compounds, Vol. I. New York: W. A. Benjamin, Inc., 1965, pp. 154).

Isothiocyanates may react with carboxylic acids to liberate toxic and flammable COS gas (Smith, P. A. S., Open-Chain Nitrogen Compounds, Vol. I. New York: W. A. Benjamin, Inc., 1965, pp. 242).

Carboxylic acids may release toxic HCN gas when mixed with isocyanates or isothiocyanate. May also produce flammable and toxic H2S gas with isothiocyanates (Predicted).

Potential Gas Byproducts

• Carbon Dioxide (CO2)
• Carbonyl Sulfide (COS)
• Hydrogen Sulfide (H2S)
• Hydrogen Cyanide (HCN)
• Isocyanic Acid (HNCO)