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Sulfurous Acid Structure

Sulfurous Acid

Chemical Properties

Density  1.03 g/mL at 25 °C(lit.)
vapor density  2.3 (vs air)
solubility  solution of SO2 in H2O
pka 1.92(at 25℃)
form  Liquid
color  Colorless
Water Solubility  Miscible with water.
Sensitive  Air Sensitive
Merck  14,8976
Dielectric constant 15.6(0℃)
Stability Stable. Incompatible with strong bases.
InChIKey LSNNMFCWUKXFEE-UHFFFAOYSA-N
LogP -1.579 (est)
Substances Added to Food (formerly EAFUS) SULFUROUS ACID
CAS DataBase Reference 7782-99-2(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII J1P7893F4J
EPA Substance Registry System Sulfurous acid (7782-99-2)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H314-H332
Precautionary statements P261-P271-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C,Xn
Risk Statements  20-34-36/38
Safety Statements  26-36/37/39-45
RIDADR  UN 1833 8/PG 2
WGK Germany  1
RTECS  WT2775000
10-23
TSCA  Yes
HazardClass  8
PackingGroup  II
HS Code  28111990
NFPA 704:
1
3 1

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