Potassium bitartarate
CAS No.:868-14-4
Synonym: acid potassium tartrate
Physical and chemical properties
Colorless crystal or white crystalline powder, odorless, with a cool sour taste. It is carbonized after strong heat, and has the smell of sugar burning. The relative density is 1.956. The solubility in water varies with temperature. It is difficult to dissolve in cold water (0.84g/100ml, 25 ° C and ethanol 0.0001g/100ml, normal temperature) and soluble in hot water (6.9g/100ml, 100 ° C). The pH value of the saturated aqueous solution was 3.66 (17. degrees. C.). It is a neutral soluble double salt in potassium hydroxide or potassium carbonate solution and is precipitated again after adding acid.
Tartar, a by-product of wine brewing, is further crystallized with acid or alkali after water extraction; Or by the action of tartaric acid with potassium hydroxide or potassium carbonate.
Toxicological basis
① LD50: acute oral 6.81g/kg (BW) in mice.
②GRAS：FDA-21CFR 184.1077.
Application
Bulking agent
GB 2760-2014 stipulates that it can be used for wheat flour and its products and baked food, and can be used in an appropriate amount according to production needs.
This product is mainly used as the raw material for composite bulking agents. When used as a compound bulking agent for baking food, its content is 10% ~ 25%. If 30-40g of the bulking agent is used per kilogram of flour, 3-10g of potassium hydrogen tartrate is contained per kilogram of flour.
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