Sulfur Dioxide

CAS Number

7446-09-5

Synonym

Sulfur oxide; Sulfurous anhydride; Sulfurous oxide

Occurrence/Use

Product of combustion, including from oil refineries, power plants, and automobile exhaust. Occurs naturally in volcanic and biogenic emissions, and decay of biologic materials.

Cancer Potency Information

Latest Criteria:	Acute Reference Exposure Levels

Air

Acute RELs

Acute REL (μg/m3):	660
Species:	Human
Acute REL Toxicologic Endpoint:	Respiratory irritation
Acute REL Target Organs:	Respiratory system
Last Acute REL Revision:	1999
Acute Reference Exposure Levels Comments:	OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D2.

Proposition 65

MADL w/ File

Chemical Status

Reproductive Toxicity :	Currently listed

Reproductive Toxicity

Listed as causing:	Developmental Toxicity
Developmental Toxicity
Date of Listing:	07/29/2011
Basis for Listing :	State's Qualified Experts

Safe Harbor Levels

Reproductive Toxicity
Maximum Allowable Dose Level (MADL) :	10,000 µg/day
Last NSRL/MADL Revision:	2013

Documents, Presentations, and Publications

Reproductive Toxicity:	Evidence on the Developmental and Reproductive Toxicity of Sulfur Dioxide (OEHHA, 2011) February 25, 2011 Initial Statement of Reasons - Title 27 Section 25805 Maximum Allowable Dose Level (MADL) for Sulfur Dioxide (SO2) June 28, 2012

Reproductive Toxicity:

Evidence on the Developmental and Reproductive Toxicity of Sulfur Dioxide (OEHHA, 2011)

February 25, 2011

Initial Statement of Reasons - Title 27 Section 25805 Maximum Allowable Dose Level (MADL) for Sulfur Dioxide (SO2)

June 28, 2012

Public notices related to this chemical

Meetings

July 12 And 13, 2011 Meeting of the Developmental and Reproductive Toxicant Identification Committee (DART IC)