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NIOSH conducted this HHE to investigate complaints from underground coal miners of illnesses, including respirato ry problems, asthma, and skin irritation, after exposure to rock glues in the course of their work duties. NIOSH was requested to provide guidance in establishing a com­ pany medical surveillance program for those workers with exposure to rock glue adhesives containing isocyanates. NIOSH reviewed and concurred with the proposed safety precautions to be taken during the application of the rock glue. Recommendations included substituting non-isocyanate-containing products where feasible and providing protective clothing made from laminates to protect against dermal exposure to isocyanates. ­ HETA 97–0217–2667 December 1997 Requester: Management Method(s): NIOSH 5522 Range of isocyanates: two GA samples— 20.1 μg/m and 30.7 μg/m ppm MDI Purpose: To investigate workers’ exposures and symptoms, including dizziness and sleepiness, that were believed to be related to a hot melt adhesive process used in the production of residential doors *

A summary of health hazard evaluations: issues related to occupational exposure to isocyanates 1989 to 2002.