Tartaric acid is a white crystalline organic acid that occurs naturally in many fruits, most notably in grapes, but also in bananas, tamarinds and citrus. Its salt, potassium bitartrate, commonly known as cream of tartar, develops naturally in the process of winemaking.
It is commonly mixed with sodium bicarbonate and is sold as baking powder used as a leavening agent in food preparation. The acid itself is added to foods as an antioxidant and to impart its distinctive sour taste.
|White crystal powder|
Place of origin
|D-Tartaric acid Chemical Properties|
|Melting point||172-174 °C(lit.)|
|alpha||-12.1 º (c=20, H2O)|
|Boiling point||191.59°C (rough estimate)|
|refractive index||-12.5 ° (C=5, H2O)|
|storage temp.||Store below +30°C.|
|solubility||water: soluble100mg/mL, clear, colorless|
|pka||3.0, 4.4(at 25ºC)|
|form||Crystals or Crystalline Powder|
|optical activity||[α]20/D 13.5±0.5°, c = 10% in H2O|
|Water Solubility||1394 g/L (20 ºC)|
|Stability:||Stable. Incompatible with oxidizing agents, bases, reducing agents. Combustible.|
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