This guide serves as a technical reference to assist workers, employers, and occupational health professionals in recognizing and controlling chemical hazards in the workplace. The authors, representing the National Institute for Occupational Safety and Health (NIOSH), compile critical data on hundreds of substances to provide a standardized framework for safety compliance and risk assessment. The text functions as a field-ready manual for identifying exposure limits and protective measures.

Experts and safety professionals recognize this guide as a foundational reference for industrial hygiene and workplace safety compliance. Readers frequently note the technical density of the data, which is intended for professional use rather than general public consumption.