Cream of Tartar

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Cream of Tartar

The very best value in pure Cream of Tartar.

Cream of tartar is a very useful byproduct of wine making. It is the mild potassium acid salt of tartaric acid.

It is used in so many ways. One way cream of tartar is used is to give meringues and angel food cake their "fluff" and elevation. Another new, popular use for it is for making Bath Bombs or other bath fizzies, the cream of tartar is often the perfect cure for hardening bath bombs and Bubble Bars.

In food, cream of tartar is used in a variety of ways:

  • Stabilizing egg whites, - increasing their heat tolerance and volume
  • Making Meringues
  • Thickening and Anti-Caking
  • Stabilizing whipped cream, to maintain texture and volume
  • Preventing sugar syrups from crystallizing
  • Reducing discoloration of boiled vegetables

It is also used as a sodium-free salt substitutes in combination with potassium chloride

Used in baking powder as an acid ingredient to activate baking soda. To mix your own baking powder, combine 1/4 teaspoon baking soda with 1/2 teaspoon cream of tartar.

Cream of tartar, when mixed into a paste with hydrogen peroxide, can be used to clean rust from tools, like hand files. After mixing, apply the paste and let it sit for a few hours and then wash it off with with a baking soda/water solution to neutralize it. Then rinse again with water , and allow to dry. Afterwards add a light application of oil to protect the tool(s) from further rusting.

Used in Cleaning: Cream of Tartar can be mixed with a simple acidic liquid like lemon juice or white vinegar. This will a paste-like cleaning agent for metals such as brass, aluminum or copper.

Cream of Tartar can also be mixed with water for other cleaning jobs like removing light stains from porcelain. DON'T make the mistake of mixing vinegar and sodium bicarbonate (baking soda). These react and neutralize each other, creating carbon dioxide and a sodium acetate solution (it foams like crazy).

Formulations using Cream of Tartar:

Anne's Emulsifying Bath Bombs

Fizzy Bath Tablets

Solid Bubble Bars

Product Code, INCI Name and CAS No.

  • INCI Name: Potassium Bitartrate
  • CAS no: 868-14-4
  • EINECS no.: 2127691


  • Appearance: White to Off White Powder
  • Odor: Nuetral
  • Formula: C4H5KO6
  • Heavy Metals: 10PPM
  • Lead: <1PPM
  • Arsenic: <1PPM
  • Loss on Drying: <0.002%
  • Assay: 99.95%
  • Solubility: 1 Gram dissolves in 16ml of boiling water
  • pH (1%) in water: 3.5-3.6

Use in Cosmetics and Soap Making

Used commonly in cooking, stabilizing bath bombs, pastes, cleaning agents, etc.


Keep in a cool (preferably below 85°F, the cooler the better), dark and dry store-room.

Shelf Life

Under optimal storage conditions, in original unopened drums/containers, minimum two years.

Safety Data Sheet

8 Reviews Hide Reviews Show Reviews

  • 5
    My go to.

    Posted by Nadia on May 22nd 2020

    This is the only Cream of tartar I use.

  • 5
    Great Product

    Posted by Diana on Sep 23rd 2019

    Happy with purchase

  • 5

    Posted by on Jun 9th 2019

    Always great service with great products

  • 5
    Cream of Tartar

    Posted by Cecilia Davoren on Dec 13th 2018

    The cream of tartar from Chemistry Connection has a great consistency and it is perfect for our bath bombs. It is also the best price for the high quality we get.

  • 5
    Terrific Product - Fantastic Price

    Posted by Angel Dobs on Jan 2nd 2018

    I use the Cream of Tartar in my bath bombs. I'm convinced it helps to harden the bath bombs and at this price, I can afford to use it in every batch.

  • 5
    Best price on COT i have found

    Posted by HeatherMcClain on Dec 25th 2017

    Not clumpy, easy to use and store packaging, does exactly what it’s supposed to do in my product!! Will not buy anywhere else!

  • 5

    Posted by Pamela Burton on Aug 31st 2017

    Great price!

  • 5

    Posted by Michelle Liversage on Aug 15th 2017

    Great price and great quality.