| Identification | Back Directory | [Name]
POTASSIUM HYDROGEN SULFITE | [CAS]
7773-03-7 | [Synonyms]
POTASSIUM BISULFITE
POTASSIUM HYDROGEN S
Potassium acid sulfite
potassiumhydrogensulphite
potassiumsulfite,hydrogen
POTASSIUM HYDROGEN SULFITE
potassiumbisulfitesolution
Sulfurous acid monopotassium
Sulfurousacid,monopotassiumsalt
Sulfurous acid hydrogen=potassium salt | [EINECS(EC#)]
231-870-1 | [Molecular Formula]
HKO3S | [MDL Number]
MFCD00673725 | [MOL File]
7773-03-7.mol | [Molecular Weight]
120.17 |
| Chemical Properties | Back Directory | [Appearance]
White, crystalline powder; sulfur diox-
ide odor. Soluble in water;
insoluble in alcohol.
| [Melting point ]
decomposes at 190℃ [HAW93] | [solubility ]
insoluble in ethanol | [form ]
white crystalline powder | [color ]
white crystals, crystalline powder | [Water Solubility ]
soluble H2O; insoluble alcohol [HAW93] | [Uses]
Reduction of various organic compounds;
purification of aldehydes and ketones, iodine,
sodium hydrosulfite; antiseptic; source of sulfurous
acid, particularly in brewing; analytical chemistry;
tanning; bleaching straw and textile fibers; chem-
ical preservative in foods (except meats and other
sources of vitamin B
1
).
| [CAS DataBase Reference]
7773-03-7 | [EPA Substance Registry System]
Sulfurous acid, potassium salt (1:1) (7773-03-7) |
| Hazard Information | Back Directory | [Chemical Properties]
White, crystalline powder; sulfur diox-
ide odor. Soluble in water;
insoluble in alcohol.
| [General Description]
Colorless aqueous with a slight sulfur dioxide odor. Used as a reducing agent and chemical preservative. | [Air & Water Reactions]
Soluble in water. | [Reactivity Profile]
POTASSIUM HYDROGEN SULFITE is a reducing agent. Rreacts as a base to neutralize acids. | [Health Hazard]
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. | [Fire Hazard]
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. |
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