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Potassium Bitartrate

Potassium Bitartrate
Potassium Bitartrate structure
Chemical Name:
Potassium Bitartrate
faccla;faecla;tartar;faecula;faccula;WINELEES;tartarcream;cremortartari;PotassiuM bitartrat;L(+)-Potassium hydro
Molecular Formula:
Formula Weight:
MOL File:

Potassium Bitartrate Properties

Melting point:
267°C (dec.)
32.5 º (c=10, 1N NaOH)
1.954 g/mL at 25 °C(lit.)
Flash point:
storage temp. 
Inert atmosphere,Room Temperature
Crystals or Powder
Colorless opaque or white
Specific Gravity
PH Range
3.4 - 3.7 at 20 °C
3.4-3.7 (H2O, 20℃)(saturated solution)
optical activity
[α]20/D +8.0 to +9.2°
Water Solubility 
Soluble in water and dilute mineral acid. Insoluble in alcohol.
Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference
868-14-4(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS)
SCOGS (Select Committee on GRAS Substances)
L(+)-potassium acid tartrate
ATC code
EPA Substance Registry System
Potassium bitartrate (868-14-4)
  • Risk and Safety Statements
Safety Statements  24/25
WGK Germany  1
RTECS  WW8223000
HS Code  29181300
NFPA 704
1 0

Potassium Bitartrate price More Price(20)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 243531 Potassium L-tartrate monobasic 99% 868-14-4 5g $22.6 2021-12-16 Buy
Sigma-Aldrich 1.01963 Potassium hydrogen tartrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S) = 3.63? / pH(S) = 3.55? (25°C) Certipur? 868-14-4 25 g $148.92 2021-12-16 Buy
Sigma-Aldrich 1549840 Potassium bitartrate United States Pharmacopeia (USP) Reference Standard 868-14-4 3g $350 2021-12-16 Buy
Alfa Aesar A15281 Potassium hydrogen L-tartrate, 98+% 868-14-4 1000g $99.7 2021-12-16 Buy
Alfa Aesar A15281 Potassium hydrogen L-tartrate, 98+% 868-14-4 250g $32.6 2021-12-16 Buy

Potassium Bitartrate Chemical Properties,Uses,Production


L (+)-Potassium hydrogen tartrate (also known as potassium bitartrate) is the potassiumacid salt of tartaric acid (a carboxylic acid). It is the byproduct during the winemaking process. It can be used in baking or as a cleaning solution. When mixed with an acidic liquid such as lemon juice or white vinegar, it can be made of a paste-like cleaning agent for metals or some other cleaning applications. It can also be used as a pH buffer component in chemistry. It has been recently shown that it is capable of treating breast cancer.
Potassium Bitartrate
Approved by the FDA as a direct food substance, potassium bitartrate is used as an additive, stabilizer, pH control agent, antimicrobial agent, processing aid, or thickener in various food products. Potassium bitartrate has a long history of medical use as a laxative administered as a rectal suppository and is an approved third-class OTC drug in Japan. Potassium bitartrate was one of active ingredients in Phexxi, a non-hormonal contraceptive agent that was approved by the FDA on May 2020.

Chemical Properties

Potassium Bitartrate, or tartar, is a salt produced from the crystalsfound on the sides of wine casks. When purified it is known as cream oftartar. It is acid, and is slightly soluble in water.It is used in baking powder, for medicine, and as an acid and buffer in foods.

Chemical Properties

Potassium bitartrate, also known as potassium hydrogen tartrate, has formula KC4H5O6, 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 crystallizes in wine casks during the fermentation of grape juice, and can precipitate out of wine in bottles.The crystals (wine diamonds) will often form on the underside of a cork in wine-filled bottles that have been stored at temperatures below 10°C , and will seldom, if ever, dissolve naturally into the wine.
These crystals also precipitate out of fresh grape juice that has been chilled or allowed to stand for some time. To prevent crystals forming in homemade grape jam or jelly, fresh grape juice should be chilled overnight to promote crystallisation. The potassium bitartrate crystals are removed by filtering through two layers of cheesecloth. The filtered juice may then be made into jam or jelly. In some cases they adhere to the side of the chilled container, making filtering unnecessary.
The crude form (known as beeswing) is collected and purified to produce the white, odorless, acidic powder used for many culinary and other household purposes.


Largely in baking powders; coloring metals, galvanic tinning of metals; reducer of CrO3 in mordants for wool.


Potassium L-tartrate monobasic may be used as a reductant during the synthesis of noble metal nanoparticles in the presence of linear polymers as protective agents.


In food
In food, potassium bitartrate is used for:
Stabilizing egg whites, increasing their heat tolerance and volume
Stabilizing whipped cream, maintaining its texture and volume
Preventing sugar syrups from crystallising
Reducing discolouration of boiled vegetables
Thickening Tartar sauce
Additionally it is used as a component of: Baking powder, as an acid ingredient to activate baking soda Sodium-free salt substitutes, in combination with potassium chloride
A similar acid salt, sodium acid pyrophosphate, can be confused with cream of tartar because of their common function as a component of baking powder.
House hold use
Potassium bitartrate can be mixed with an acidic liquid such as lemon juice or white vinegar to make a paste - like cleaning agent for metals such as brass, aluminum or copper, or with water for other cleaning applications such as removing light stains from porcelain.
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. Cream of tartar was often used in traditional dyeing where the complexing action of the tartrate ions were used to adjust the solubility and hydrolysis of mordant salts such as tin chloride and alum.
Cream of tartar, when mixed into a paste with hydrogen peroxide, can be used to clean rust from some hand tools, notably hand files. The paste is applied and allowed to set for a few hours and then washed off with a baking soda/water solution.
Potassium acid tartrate, also known as potassium hydrogen tartrate, is, according to NIST, used as a primary reference standard for a pH buffer. .


potassium bitartrate is mainly produced from the mother liquor of Seignette's salt. These decolorized, purified, and filtered solutions are acidified to pH 3.5 with hydrochloric or sulfuric acid. Since cream of tartar is sparingly soluble, it precipitates and is recovered by centrifugation, dried, and ground before being packaged as fine powder.

General Description

Potassium L-tartrate is found naturally in grapes. Its removal is necessary during wine making as it can precipitate, which is undesirable.

Purification Methods

It crystallises from water (17mL/g) between 100o and 0o. Dry it at 110o. [Beilstein 3 IV 1222.]


Coulter, A. D, et al. "Potassium bitartrate crystallisation in wine and its inhibition." Australian Journal of Grape & Wine Research 21.S1(2016):627-641.
Berg, H. W, and M. Akiyoshi. "Utility of potassium bitartrate concentration-product values in wine processing." Amer J Enol Vitic (1971).
Cremer, G. A., and R. Boulton. "The hydrolysis of gelatin by an immobilized acid protease. I. Immobilization and hydrolysis kinetics. " American Journal of Enology & Viticulture 1(1981):14-17.
Dr, María J. Vicent, et al. "The Therapeutic Action of Potassium Bitartrate." Angewandte Chemie 44.26(2005):4061-6.

Potassium Bitartrate Preparation Products And Raw materials

Raw materials

Preparation Products

Potassium Bitartrate Suppliers

Global( 278)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-66670886 China 15426 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 China 22607 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418697 China 3000 55
career henan chemical co
+86-0371-55982848 China 29953 58
+86 18953170293
+86 0531-67809011 CHINA 2940 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28229 58
hdzhl biotechnology co., ltd
86-13032617415 CHINA 1275 58
Shandong chuangyingchemical Co., Ltd.
18853181302 CHINA 5917 58
Chongqing Chemdad Co., Ltd
+86-13650506873 CHINA 37282 58
Shaanxi Dideu Medichem Co. Ltd
029-88380327 CHINA 3994 58

View Lastest Price from Potassium Bitartrate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2022-01-21 Potassium Bitartrate
US $26.00 / KG 1KG 99.9% 1000kg/month Shanxi Lianxu New Material Co., LTD
2021-12-01 Potassium bitartrate
US $10.60 / KG 1KG 99% 5000kg Hebei Crovell Biotech Co Ltd
2021-07-13 Potassium Bitartrate
US $15.00-10.00 / KG 1KG 99%+ HPLC Monthly supply of 1 ton Zhuozhou Wenxi import and Export Co., Ltd

Potassium Bitartrate Spectrum

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