Hazardous Chemical Information System (HCIS)

Exposure Standard Documentation


CAS Number: 91-20-3

Exposure Standard:

TWA: 10 ppm 52 mg/m3

STEL: 15 ppm 79 mg/m3

Documentation notice. American Conference of Governmental Industrial Hygienists (ACGIH), Documentation of Threshold Limit Values and Biological Exposure Indices, 6th Edition, ACGIH, Cincinatti, Ohio, 1991

No standard should be applied without reference to Guidance on the interpretation of Workplace exposure standards for airborne contaminants.


Documentation notice

Documentation for the majority of substances can be found in the American Conference of Governmental Indistrial Hygienists' (ACGIH) documentation of the threshold limit values and biological exposure indices - users should refer to the ACGIH documentation cited.