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.

More information about Sulfur Dioxide

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.