Hazardous Chemical Information System (HCIS)

Ethylene oxide

SUBSTANCE NAME:Ethylene oxide

Synonym: Oxirane

CAS Number: 75-21-8

Exposure Standard:

TWA: 1 ppm 1.8 mg/m3

STEL: - ppm - mg/m3

Carcinogen category notice:

Category 1B: Presumed to have carcinogenic potential for humans; the placing of this substance is largely based on animal evidence. See section 3.6 of the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) Third revised edition.

Based on strength of evidence together with additional considerations, such evidence may be derived from human studies that establish a causal relationship between human exposure to a substance and the development of cancer (known human carcinogen). Alternatively, evidence may be derived from animal experiments for which there is sufficient evidence to demonstrate animal carcinogenicity (presumed human carcinogen). In addition, on a case by case basis, scientific judgement may warrant a decision of presumed human carcinogenicity derived from studies showing limited evidence of carcinogenicity in humans together with limited evidence of carcinogenicity in experimental animals.

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.

Footnotes:

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.