There are twenty-eight OSHA-approved State Plans, operating state-wide occupational safety and health programs. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or more stringent requirements.
Isocyanates hazards are addressed in specific standards for general industry, shipyard employment, and the construction industry. This section highlights OSHA standards and standard interpretations (official letters of interpretation of the standards) related to isocyanates.
General Industry (29 CFR 1910)
- 1910 Subpart H, Hazardous materials
- 1910 Subpart Z, Toxic and hazardous substances [related topic page]
Shipyard Employment (29 CFR 1915)
Construction Industry (29 CFR 1926)
- 1926 Subpart D, Occupational health and environmental controls
- Selection of air purifying respirators for gases and vapors with poor warning properties (diisocyanates). (July 18, 2000). Clarification regarding OSHA's position on the selection of air purifying respirators (APR's) for gases and vapors with poor warning properties.