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POTASSIUM METABISULFITE Structure

POTASSIUM METABISULFITE

Chemical Properties

Melting point 190°C
Density  2.34 g/cm3
vapor density  2.3 (vs air)
storage temp.  Store at +5°C to +30°C.
solubility  H2O: 0.1 M at 20 °C, clear, colorless
form  Powder/Solid
Specific Gravity 2.3
color  White to slightly yellow
PH 2.5-4.5 (25℃, 0.1M in H2O)
Odor Odorless
PH Range 3-4.5 at 22.2 g/l at 25 °C
Water Solubility  Soluble in water. Insoluble in ethanol.
Sensitive  Air Sensitive
λmax 267nm(H2O)(lit.)
Decomposition  150°C
Merck  14,7645
FDA 21 CFR 182.3616; 182.3637; 582.3616; 582.3637
Substances Added to Food (formerly EAFUS) POTASSIUM METABISULFITE
SCOGS (Select Committee on GRAS Substances) Potassium metabisulfite
EWG's Food Scores 1-2
FDA UNII 65OE787Q7W
EPA Substance Registry System Disulfurous acid, potassium salt (1:2) (16731-55-8)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H318-H335
Precautionary statements P261-P271-P280-P304+P340+P312-P305+P351+P338-P403+P233
Hazard Codes  Xi
Risk Statements  31-36/37/38-41
Safety Statements  26-36-39
WGK Germany  1
RTECS  TT4920000
23
TSCA  Yes
HS Code  28322000
Hazardous Substances Data 16731-55-8(Hazardous Substances Data)
Toxicity LD50 orally in Rabbit: 2300 mg/kg
NFPA 704:
1
2 1

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