The ICSC U.S. National version of the cards have been modified by the National Institute for Occupational Safety and Health (NIOSH, USA) to include the following:

• Occupational Safety and Health Administration Permissible Exposure Limits (OSHA PELs).
  
• National Institute for Occupational Safety and Health Recommended Exposure Levels (NIOSH RELs).
  
• Immediately Dangerous to Life and Health values (IDLHs) and their documentation.
  
• Links to the text of the NIOSH Pocket guide
  
• Links to Specific Medical Tests Published in the Literature for OSHA Regulated Substances
  
• NIOSH Appendices to the Pocket guide
  

• INDEX with CHEMICAL NAMES* and SYNONYMS   Note: A - Z, (26) Small Files
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