he NPG is intended as a source of general industrial hygiene information on several hundred chemicals/classes for workers, employers, and occupational health professionals. The NPG does not contain an analysis of all pertinent data, rather it presents key information and data in abbreviated or tabular form for chemicals or substance groupings (e.g. cyanides, fluorides, manganese compounds) that are found in the work environment. The information found in the NPG should help users recognize and control occupational chemical hazards.

he Pocket Guide includes the following:

	Chemical Names, synonyms, trade names, conversion factors, CAS, RTECS, and DOT Numbers
	NIOSH Recommended Exposure Limits (NIOSH RELs)
	Occupational Safety and Health Administration (OSHA)
	Permissible Exposure Limits (PELs)
	NIOSH Immediate Dangerous to Life and Health values
	(NIOSH IDLHs) (documentation for those values can be found elsewhere on this website)
	A physical description of the agent with chemical and physical properties
	Measurement methods
	Personal Protection and Sanitation Recommendations
	Respirator Recommendations
	Information on Health Hazards including route, symptoms, first aid and target organ information.

he latest printed edition of the NIOSH Pocket Guide is dated February 2004 (green cover, NIOSH Publication No. 97-140, fourth printing with changes and updates) and contains information on 677 chemicals or substance groupings.