SWCAA Pollutant Details

7446-09-5: SULFUR DIOXIDE

  • SULFUROUS ANHYDRIDE
  • SULFUROUS OXIDE

IUPAC: sulfur dioxide
InChi Key: RAHZWNYVWXNFOC-UHFFFAOYSA-N WEB


HAP:   NO
VOC:   NO
Criteria Pollutant:   YES
Particulate:   NO
Trace Element:   NO
98 ECY TAP:   NO
09 ECY TAP:   YES
19 ECY TAP:   YES
Chemical Formula:   SO2
Element Count:   S O2
Molecular Weight:   64.064 g/mol
GHG-EPA:   NO
GHG-WA state:   NO
CO2 Equivalent:  
PM Precursor:  
Ozone (O3) Precursor:  
Ozone Depleting:  
Ozone Depletion Potential:  
Lifetime in Years:  
Marijuana Pollutant:   NO
ECY PBT:  
SWCAA TAP Category:   REVIEW
EPA HAP Category:    
EPA HAP Group Category:  
EPA NEI Pollutant Code:   SO2
EPA SRS ID:   150367  Web
EPA ATW FACT SHEET:   Web
EPA NEI COMPOUND ID:   E17001736
EPA Banned Substance:   NO
EPCRA 313 PBT:  
EPA Urban HAP:   NO
     

Boiling Point:   14 / -10.00 F/C
Melting Point:   -98.9 / -72.78 F/C
Specific Gravity:   1.434
Vapor Pressure:   3000 mmHg@77F (25C)
Henry's Law Constant:  
Convert ppm to mg/m3:   2.618
Log Pow:  

Regulated Under These Programs

NIOSH OSHA ACGIH OEHHA
EPA IRIS ATSDR EPA ATW TSCA 2019
CAL TOXIC NEW JERSEY TRI 2014 DFG

SWCAA / WAC 173-460 (1998) TOXIC LIMITS
ASIL SQER TAP
Class
24hr ug/m3 Annual ug/m3 lbs/yr lbs/hr
 
WAC 173-460 (2009) TOXIC LIMITS
 
ASIL ug/m3 SQER lbs/ Deminimus lbs/ Average Period
26.7  0.146  0.0073  1 HR 

WAC 173-460 (2019) TOXIC LIMITS
 
ASIL ug/m3 SQER lbs/ Deminimus lbs/ Average Period
660  1.2  0.46  1 HR 
IRIS EPA Integrated Risk Information System (IRIS) Web
IRIS INH REF CONC (non cancer):   
IRIS URF (cancer):   per ug/m3
   
IRIS WOE Cancer Class: 

Oregon Department of Environmental Quality Web
Ambient Benchmark Concentration:  
New Jersey Department of Health Web
Right To Know Code: 1759 Web 

Idaho Occupational Exposure Limits (OEL) Web
IDAHO DEQ Type:   
IDAHO OEL (non-cancer):   mg/m3
IDAHO ACC (non-cancer):   mg/m3
IDAHO DEQ Emission Level:   lb/hr
IDAHO DEQ URF (cancer):   per ug/m3
IDAHO AACC (cancer):   ug/m3
Texas Effects Screening Levels (ESL) Web
Short Term ESL:  must meet NAAQS  ug/m3
Basis:  Health  
 
Long Term ESL:  --  ug/m3
Basis:  --  

ACGIH Threshold Limit Values (TLV) Web
2008 ACGIH TLV TWA:  2  ppm
2008 ACGIH STEL:  5  ppm
2008 ACGIH Carcinogen Class:   
ATSDR Minimal Risk Levels (MRL) Web
ATSDR GMMC AIR:  0.6333656  mg/m3
 ATSDR Chronic MRL:  
 ATSDR Acute MRL: 0.01  ppm
 ATSDR Interrim MRL:  
 ATSDR Carcinogenicity Class: 3  

NIOSH Recommended Exposure Limits (REL) Web
NIOSH RTECS No:  WS4550000  
NIOSH ICSC No:  0074  Web
NIOSH REL TWA:  2  ppm
NIOSH STEL:  5  ppm
NIOSH IDLH:  100  ppm
OEHHA Category Group Ref Exposure Levels (REL) Web
OEHHA Acute REL:  660  ug/m3
OEHHA Chronic REL:   
OEHHA URF (cancer):   per ug/m3
   

OSHA Permissible Exposure Limits (PEL) Web
OSHA PEL TWA:   ppm
OSHA STEL:   
DFG German Research Foundation (MAK) Web
Carcinogen and Mutagen Categories:
DFG MAK:   cancer
DFG BAT:   mutagen

DISCLAIMER: The SWCAA Pollutants Detail Page reports values from other authorized sources such as IRIS or NIOSH. These sources are frequently updated with the results of more current studies. To ensure you have the most current values please visit the appropriate agency Website.

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