Monitoring Methods used by OSHA
Laboratory Sampling/Analytical Method:
MCE filter followed by a cellulose filter coated with sodium carbonate (SKC No. 225-9005, or equivalent
Special sampling tube containing an uncoated glass fiber filter, followed by a sodium carbonate coated glass fiber filter, followed by two beds of silver nitrate coated silica gel (200/200 mg). (SKC No. 226-177, or equivalent)
impregnated activated beaded carbon (100/50 mg sections) (SKC No. 226-80, or equivalent)
mixed cellulose ester filter in series with midget fritted glass bubbler (MFGB) containing 15 mL 0.3N hydrogen peroxide.
NTP: Not listed
IARC: Class 3 (not classifiable as to its carcinogenicity to humans)
EPA: Not listed
EPA Inhalation Reference Concentration (RfC): Not established
Notes on other potential health effects and hazards:
Contact with liquid sulfur dioxide can cause frostbite on the skin (NIOSH/IPCS 2006).
Some evidence indicates an association between environmental exposure to sulfur dioxide during pregnancy and low birth weight (ATSDR 1998).
Partial reference list:
ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) – Sulfur Dioxide. 2016.
ATSDR: Toxicological Profile – Sulfur Dioxide. US Health and Human Services (US HHS), 1998.
NIOSH: Occupational Health Guideline – Sulfur Dioxide, 1978.
NIOSH/CEC/IPCS: International Chemical Safety Cards – Sulphur Dioxide. October 10, 2006.