| Identification | More | [Name]
Potassium tartrate | [CAS]
921-53-9 | [Synonyms]
CREAM OF TARTAR
DIPOTASSIUM TARTRATE
L-(+)-CREAM OF TARTAR
L(+)-POTASSIUM HYDROGEN TARTRATE
L(+)TARTARIC ACID DIPOTASSIUM
L-(+)TARTARIC ACID DIPOTASSIUM SALT
L(+)-TARTARIC ACID MONOPOTASSIUM SALT
POTASSIUM ACID TARTRATE
POTASSIUM BITARTARATE
POTASSIUM (+)-BITARTRATE
POTASSIUM BITARTRATE
POTASSIUM HYDROGEN L-TARTRATE
POTASSIUM HYDROGEN TARTARATE
(+)-POTASSIUM HYDROGEN TARTRATE
POTASSIUM HYDROGEN (+)-TARTRATE
POTASSIUM HYDROGEN TARTRATE
POTASSIUM L-BITARTRATE
POTASSIUM L-TARTRATE MONOBASIC
POTASSIUM (+)-TARTRATE
POTASSIUM TARTRATE | [EINECS(EC#)]
212-769-1 | [Molecular Formula]
C4H4K2O6 | [MDL Number]
MFCD00013065 | [Molecular Weight]
226.27 | [MOL File]
921-53-9.mol |
| Chemical Properties | Back Directory | [Appearance]
white crystalline powder | [density ]
1.954 g/mL at 25 °C(lit.)
| [vapor pressure ]
0Pa at 25℃ | [Fp ]
200-220°C | [Stability:]
Stable. | [Decomposition ]
200-220 ºC | [LogP]
-1.426 (est) | [Uses]
Potassium tartrate is the acid potassium salt of tartaric acid occurring as crystals or powder. It is relatively poorly soluble having a solubility in 100 ml of water at 0.8 g at 25°c and 6.1 g at 100°c. A 1% solution at 30°c has a ph of 3.4. Chemical names are potassium acid tartrate, potassium hydrogen tartrate, and potassium bitartrate. It functions to complex with heavy metal ions and to regulate ph; it can have a gentle laxative action if given at adequate levels. The acidulant is used in chemical leavening to release carbon dioxide which produces the loaf volume. It has limited reactivity in the cold so when used in reduced-temperature batters it has little gas evolution during the initial mixing. At room temperatures, it has a relatively fast reaction rate. It functions as a taste regulator in sugar icing and in controlled crystallization of toffees and fondants by the regulated inversion of sucrose. It is used in baked goods, crackers, candy, and puddings. | [CAS DataBase Reference]
921-53-9(CAS DataBase Reference) | [EPA Substance Registry System]
921-53-9(EPA Substance) |
| Hazard Information | Back Directory | [Description]
Potassium tartrate, dipotassium tartrate or argol has formula K2C4H4O6. It is the potassium salt of tartaric acid. It is often confused with potassium bitartrate, also known as cream of tartar. As a food additive, it shares the E number E336 with potassium bitartrate. | [Chemical Properties]
white crystalline powder | [Definition]
ChEBI: The potassium salt of L-tartaric acid. | [Preparation]
Potassium tartrate is produced by the reaction of tartaric acid with potassium sodium tartrate (rochelle salt), and potassium sulfate, followed by filtration, purification, precipitation and drying. | [Flammability and Explosibility]
Notclassified | [Purification Methods]
Recrystallise it from distilled water (solubility: 0.4mL/g at 100o, 0.7mL/g at 14o). [Beilstein 3 IV 1223.] |
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