- published: 17 Mar 2015
- views: 105337
Citric acid is a weak organic acid. It is a natural preservative/conservative and is also used to add an acidic, or sour, taste to foods and soft drinks. In biochemistry, the conjugate base of citric acid, citrate, is important as an intermediate in the citric acid cycle, and therefore occurs in the metabolism of virtually all living things.
Citric acid is a commodity chemical, and more than a million tonnes are produced every year by fermentation. It is used mainly as an acidifier, as a flavoring, and as a chelating agent.
At room temperature, citric acid is a white crystalline powder. It can exist either in an anhydrous (water-free) form or as a monohydrate. The anhydrous form crystallizes from hot water, whereas the monohydrate forms when citric acid is crystallized from cold water. The monohydrate can be converted to the anhydrous form by heating above 78 °C. Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C.
In chemical structure, citric acid shares the properties of other carboxylic acids. When heated above 175 °C, it decomposes through the loss of carbon dioxide and water (see decarboxylation).
DIY Lush bath bombs WITHOUT citric acid+DEMO!
Chemical Reaction of Citric Acid and Baking Soda
Using citric acid for rust removal
Citric acid, why you may want to avoid it. | JustMalin
DIY Bath Bombs without citric acid
Reaction Citric Acid with Baking Soda
Is Citric Acid Harmful?
The Citric Acid Cycle: An Overview
Citric Acid Challenge
Where to find citric acid in Walmart!
DIY Bath Bombs Without Citric Acid & Cream of Tartar
Clean Your Espresso Machine with Citric Acid
DIY CO2 Citric acid and Baking soda
Part 2 of the MMS mixing series - Proper mixing of citric acid.