NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005


The NIOSH Pocket Guide to Chemical Hazards (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.


What's Inside

The Pocket Guide includes the following:

  • Chemical names, synonyms, trade names, conversion factors, CAS, RTECS, and DOT numbers
  • NIOSH Recommended Expoure Limits (NIOSH RELs)
  • Occupational Safety and Health Administration (OSHA) Permissible Exposure Limits (PELs)
  • NIOSH Immediate Dangerous to Life and Health values (NIOSH IDLHs)
  • 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.

Print Version and CD-ROM Requests

To request the printed version or CD-ROM of the Pocket Guide, contact the NIOSH Publications Office.

Email address:
(Order Publication No. 2005-151)


We encourage and welcome any comments, suggestions, or corrections that you may have regarding the Pocket Guide. You can contact us via e-mail or telephone. Thank you for your comments and suggestions.

E-mail address:
Toll-free telephone: 1-800-356-4674


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