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| Assay: | 99,0-101,0 % | Loss On Drying: | ≤ 1.0 % |
|---|---|---|---|
| Chemical Formula: | CH3CH=CHCH=CHCOOK | Molecular Formula: | C6H7KO2 |
| Appearance: | White Granular Or Powder | CAS: | 24634-61-5 |
What is Potassium Sorbate?
Potassium sorbate is the potassium salt of sorbic acid, chemicalformula C6H7KO2. Its primary use is as a foodpreservative (E number E202). Potassium sorbate is effective ina variety of applications including food, wine, and personalcare products. Commercial sources are now produced by the condensation ofcrotonaldehyde and ketene (Ashford, 1994).
Properties
Potassiumsorbate is produced by neutralizing potassium hydroxide with sorbic acid, anunsaturated carboxylic acid that occurs naturally in some berries. The colourlesssalt is very soluble in water (58.2% at 20 °C).
Production
Potassiumsorbate is produced by reacting sorbic acid with an equimolar portion of potassiumhydroxide. The resulting potassium sorbate may be crystallized from aqueous ethanol.
Most of the sorbic acid isgenerally prepared by a process comprising the steps of reacting crotonaldehydewith ketene in the presence of a catalyst (e.g., a fatty acid salt of zinc) toyield a polyester, and hydrolyzing the polyester with an acid or an alkali, ordecomposing the polyester in a hot water. Most of the Potassium Sorbate createdtoday is synthetic and not natural. Commercialsources are now produced by the condensation of crotonaldehyde and ketene(Ashford, 1994).
| Parameters | Specification | Results |
| Appearance | White Granular or Powder | White Granular |
| Identification | Conform | Complies |
| Heat stability | No discoloration (105℃,90min) | Complies |
| Assay | 98,0-101,0 % | 100.75% |
| Alkalinity (as K2CO3) | ≤ 1.0 % | < 1.0 % |
| Acidity (as Sorbic Acid) | ≤ 1.0 % | < 1.0 % |
| Aldehyde (as Formaldehyde) | ≤ 0.1 % | < 0.1 % |
| Lead (Pb) | ≤ 2 mg/kg | < 2 mg/kg |
| Heavy Metals (as Pb) | ≤ 10 mg/kg | < 10 mg/kg |
| Mercury (Hg) | ≤ 1 mg/kg | < 1 mg/kg |
| Arsenic(as As) | ≤ 3 mg/kg | < 3 mg/kg |
| Loss on Drying | ≤ 1.0 % | 0.11% |
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