POTASSIUM HYDROGEN SULFITE Chemical Properties

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]

CAS DataBase Reference

7773-03-7

EPA Substance Registry System

Sulfurous acid, potassium salt (1:1) (7773-03-7)

Safety Information

Hazardous Substances Data

7773-03-7(Hazardous Substances Data)

POTASSIUM HYDROGEN SULFITE Usage And Synthesis

Chemical Properties

White, crystalline powder; sulfur diox- ide odor. Soluble in water; insoluble in alcohol.

Uses

Potassium Hydrogen sulfite is a preservative that retards bacterial action, prevents discoloration, and functions as an antioxidant. It is not used in meats or in food recognized as a source of vitamin b1 and it is not used on fruits or vegetables intended to be served raw or presented as fresh.

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 ).

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.

POTASSIUM HYDROGEN SULFITE(7773-03-7)Related Product Information

• ammonium gold(1+) sulphite
• ALUMINUM POTASSIUM SULFATE
• SINIGRIN
• 3-INDOXYL SULFATE POTASSIUM SALT
• P-NITROPHENYL SULFATE POTASSIUM SALT
• Potassium methyl sulfate
• potassium hydrogenperoxomonosulphate
• Potassium bisulfate
• 2-HYDROXY-5-NITROPHENYL SULFATE DIPOTASSIUM SALT
• CHROMIUM POTASSIUM SULFATE
• Potassium thiosulfate
• Potassium persulfate
• POTASSIUM SULFITE
• Potassium pyrosulfate
• Potassium sulfate
• POTASSIUM METABISULFITE
• NAPHTHOL AS SULPHATE POTASSIUM SALT
• PHENOLPHTHALEIN DISULFATE POTASSIUM SALT