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Toluene Diisocyanates (TDI)

What chemicals are addressed in the action plan?

The Toluene Diisocyanates (TDI) Action Plan (16 pp, 67 kb, About PDF) addresses EPA’s review of Toluene Diisocyanate (TDI) and related compounds, CASRNs 91-08-7, 584-84-9, 26471-62-5, 9017-01-0, 26747-90-0, and 26603-40-7.

EPA has developed a separate Action Plan for Methylene Diphenyl Diisocyanate (MDI) and its related compounds. TDI is chemically similar to MDI and presents similar hazard and exposure concerns, but is reportedly used in a different range of products.

Why is EPA concerned about these chemicals?

Diisocyanates are well known dermal and inhalation sensitizers in the workplace and have been documented to cause asthma, lung damage, and in severe cases, death. Worker exposures are already subject to protective controls in occupational settings, but EPA is concerned about potential health effects that may result from exposures to the consumer or self-employed worker while using products containing uncured TDI and its related polyisocyanates (e.g., spray-applied sealants and coatings) or incidental exposures to the general population while such products are used in or around buildings including homes or schools.

What action is EPA taking?

Previous actions and related actions

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