IRIS

Hydrogen sulfide

CASRN 7783-06-4

Noncancer Assessment

Reference Dose for Oral Exposure (RfD) (PDF) (18 pp, 140 K) last updated: 07/28/2003
Information reviewed but value not estimated.

 


Reference Concentration for Inhalation Exposure (RfC) (PDF) (18 pp, 140 K) last updated: 07/28/2003

System RfC (mg/m3) Basis PoD Composite UF Confidence
Nervous, Respiratory 2 x 10-3 Nasal lesions of the olfactory mucosa NOAEL (HEC): 0.64
mg/m3
300 Medium/High
Nervous, Respiratory 2 x 10-3 Nasal lesions of the olfactory mucosa NOAEL (HEC): 0.64
mg/m3
300 Medium/High

 

Cancer Assessment

Weight of Evidence for Cancer (PDF) (18 pp, 140 K) last updated: 07/28/2003

WOE Characterization Framework for WOE Characterization
Data are inadequate for an assessment of human carcinogenic potential Revised Draft Guidelines for Carcinogen Risk Assessment (US EPA, 1999)
Basis:
  • Under the Draft Revised Guidelines for Carcinogen Risk Assessment (U.S. EPA, 1999), data are inadequate for an assessment of the carcinogenic potential of hydrogen sulfide.
  • This may be a synopsis of the full weight-of-evidence narrative.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure (PDF) (18 pp, 140 K)

Not assessed under the IRIS Program.

Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure (PDF) (18 pp, 140 K)

Not assessed under the IRIS Program.

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