Food Guts - Ingredient Information

Ingredient Lookup

Cream Of Tartar

Nutritional Information

1 tsp, cream of tartar

  • Calories 8
  • Calories from Fat 0
  • Amount%DV
  • Total Fat 0g0%
  • Saturated Fat 0g0%
  • Monounsaturated Fat 0g
  • Polyunsaturated Fat 0g
  • Cholestreol 0mg0%
  • Sodium 2mg0%
  • Potassium 495mg14%
  • Total Carbohydrate 1.84g1%
  • Dietary Fiber 0g0%
  • Sugars 0g
  • Protein 0g0%
  • Calcium 0mg0%
  • Iron 1mg6%
  • Vitamin A 0%
  • Vitamin C 0%

Cream Of Tartar on Wikipedia:

Not to be confused with Tartar sauce. Potassium bitartrate other names potassium hydrogen tartrate cream of tartar potassium acid tartrate monopotassium tartrate Identifiers CAS number 868-14-4 Properties Molecular formula KC4H5O6 Molar mass 188.177 Appearance white crystalline powder Density 1.05 g/cm3 (solid) Except where noted otherwise, data are given for materials in their standard state (at 25 Â°C, 100 kPa) Infobox references

Potassium bitartrate, also known as potassium hydrogen tartrate, has formula KC4H5O6. It is a byproduct of winemaking. In cooking it is known as cream of tartar. It is the potassium acid salt of tartaric acid, a carboxylic acid.



Potassium bitartrate crystallises in wine casks during the fermentation of grape juice, and can precipitate out of wine in bottle.

This crude form (known as beeswing) is collected and purified to produce the white, odorless, acidic powder used for many culinary and other household purposes.


In food

In food, potassium bitartrate is used for:

Stabilizing egg whites, increasing their heat tolerance and volume; Preventing sugar syrups from crystallising; Reducing discolouration of boiled vegetables; Frequent combination with baking soda (which needs an acid ingredient to activate it) in formulations of baking powder. Commonly used in combination with potassium chloride in sodium-free salt substitutes

A similar acid salt, sodium acid pyrophosphate, can be confused with cream of tartar because of their common function as a baking powder.

Household use

Potassium bitartrate can be used with white vinegar to make a paste-like cleaning agent. It is a vital ingredient in Play-Doh and gingerbread house icing. This mixture is sometimes mistakenly made with vinegar and sodium bicarbonate (baking soda), which actually react to neutralise each other, creating carbon dioxide and a sodium acetate solution.


Potassium acid tartrate, also known as potassium hydrogen tartrate, is according to NIST used as a primary reference standard for a pH buffer. Using an excess of the salt in water, a saturated solution is created with a pH of 3.557 at 25 °C. Upon dissolution in water, potassium bitartrate will dissociate into acid tartrate, tartrate, and potassium ions. Thus, a saturated solution creates a buffer with standard pH. Before use as a standard, it is recommended that the solution be filtered or decanted between 22 °C and 28 °C.[1]

See also

Tartrate Tartaric acid Potassium tartrate


^ Harris, Daniel C. (17 July 2006), Quantitative Chemical Analysis (7th ed.), New York: W. H. Freeman, ISBN 978-0716776949 

External links

Description of Potassium Bitartrate at Monash Scientific This article incorporates text from the public domain 1911 edition of