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

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) Feb 25, 2011 Initial Statement of Reasons - Title 27 Section 25805 Maximum Allowable Dose Level (MADL) for Sulfur Dioxide (SO2) Jun 28, 2012

Public notices related to this chemical:

Request for Relevant Information on the Developmental and Reproductive Toxicity of: Bisphenol-A, Chlorpyrifos, Chromium, DDE, Sulfur dioxide
Availability of Hazard Identification Materials for Sulfur Dioxide and Announcement of the May 12 and 13, 2011 Developmental and Reproductive Toxicant Identification Committee Meeting
Chemical Listed Effective July 29, 2011 as Known to the State of California to Cause Reproductive Toxicity: Sulfur Dioxide
Notice of Proposed Rulemaking Title 27, California Code of Regulations Amendment to Section 25805 Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity Sulfur Dioxide
Revision of Proposed Specific Regulatory Level and Augmentation of Record for Proposed Regulation: Title 27, California Code of Regulations, Section 25805, Specific Regulatory Levels: Chemicals Causing Reproductive Toxicity Sulfur Dioxide
Notice of Adoption of Regulation Title 27, California Code of Regulations Amendment to Section 25805(b) Maximum Allowable Dose Level (MADL) for Sulfur Dioxide

Meetings:

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