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POTASSIUM BISULFITE

Potassium hydrogen sulphite

CAS: 7773-03-7

Molecular Formula: HKO3S

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POTASSIUM BISULFITE - Names and Identifiers

Name Potassium hydrogen sulphite
Synonyms potassium sulfite
POTASSIUM BISULFITE
Potassium acid sulfite
potassiumsulfite,hydrogen
potassiumhydrogensulphite
potassiumbisulfitesolution
POTASSIUM HYDROGEN SULFITE
Potassium hydrogen sulphite
Sulfurousacid,monopotassiumsalt
CAS 7773-03-7
EINECS 231-870-1
InChI InChI=1/K.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-2

POTASSIUM BISULFITE - Physico-chemical Properties

Molecular FormulaHKO3S
Molar Mass120.17
Melting Pointdecomposes at 190℃ [HAW93]
Water Solubilitysoluble H2O; insoluble alcohol [HAW93]
Appearancewhite crystalline powder
UseCommonly used as analytical reagents and reducing agents, also used in the pharmaceutical industry

POTASSIUM BISULFITE - Reference Information

EPA chemical substance information information provided by: ofmpeb.epa.gov (external link)
Introduction Potassium bisulfite is an inorganic compound that is used as an antiseptic in the production of alcoholic beverages. It is approved by the European Union as a food additive under the code e228.
identification test prepared (1 5) aqueous solution of sample, whose potassium test (IT-27) was positive, bisulfite test (IT-7) was positive.
content analysis accurately weigh 0.5g of sample, and react with 50ml of 0.1mol/L iodine solution by sulfite quantitative method, after 5min, 2ml of (2-3) hydrochloric acid was added, and the excess iodine was titrated with sodium thiosulfate, using the starch test solution as an indicator. 0.1mol/L per ml. Iodine solution is equivalent to 6.009mg khso3.
toxicity ADI 0~0.7(SO2, including total ADI value of SO2 and sulfite; FAO/WHO,2001). GRAS(FDA,§ 182.3616,2000). Not used in meat and vitamin B1 source of food.
Use commonly used as analytical reagents and reducing agents, also used in the pharmaceutical industry
production method preparation method K 2 CO 3 2SO 2 H 2 O → 2KHSO 3 CO 2SO 2 is introduced into the cold potassium carbonate saturated aqueous solution, one passes through until CO 2 is not produced and the solution becomes acidic. Adequate cooling and isolation of air should be used during operation. To the concentrated aqueous solution obtained in the above operation, approximately equal amounts of ethanol were added, and a large amount of Potassium bisulfite crystals were precipitated. The crystals were filtered with suction and washed with ethanol. The crystals were placed on filter paper and dried in a stream of nitrogen.
toxic substance data information provided by: pubchem.ncbi.nlm.nih.gov (external link)
Last Update:2024-04-09 21:21:28
POTASSIUM BISULFITE
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