POTASSIUM HYDROGEN SULFITE
Potassium hydrogen sulphite
CAS: 7773-03-7
Molecular Formula: HKO3S
POTASSIUM HYDROGEN SULFITE - 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 HYDROGEN SULFITE - Physico-chemical Properties
| Molecular Formula | HKO3S |
| Molar Mass | 120.17 |
| Melting Point | decomposes at 190℃ [HAW93] |
| Water Solubility | soluble H2O; insoluble alcohol [HAW93] |
| Appearance | white crystalline powder |
| Use | Commonly used as analytical reagents and reducing agents, also used in the pharmaceutical industry |
POTASSIUM HYDROGEN SULFITE - 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
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