Heptane, Isomers

CAS Number

108-08-7, 142-82-5, 565-59-3, 589-34-4, 590-35-2, 591-76-4

Last Revised


TWA Limit

400 ppm


500 ppm

Ceiling Limit


Basis of B.C. Exposure Limit
Minimize the potential for:
  • Respiratory irritation
  • Narcosis
  • Note: There may be other potential health effects; refer to ACGIH TLV Documentation and other relevant references.

750 ppm

 (Source: NIOSH)
If the substance you are searching has an entry that contains a size-selective fraction, form, or work activity, you should perform an additional search to confirm if other exposure limits may apply.

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