Citric acid is a weak organic acid naturally
found in a variety of fruits and vegetables.
Lemons, oranges, limes, and other citrus fruits possess high concentrations of
citric acid. As much as 8% of the dry weight or 4.7% of the lemon/lime juice is
citric acid. Within species, these values vary depending on the cultivar and the
circumstances in which the fruit was grown.
At room temperature, pure citric acid is a
white crystalline powder. It dissolves in water and absolute (anhydrous)
Citric acid is a natural
preservative/conservative and is also used to add an acidic, or sour, taste to
foods and soft drinks.
Citric acid can be added to ice cream as an emulsifying agent to keep fats from
separating, to caramel to prevent sucrose crystallization, or to recipes in
place of fresh lemon juice. Citric acid is used with sodium bicarbonate in a
wide range of effervescent formulae, both for ingestion (e.g., powders and
tablets) and for personal care (e.g., bath salts, bath bombs, and cleaning of
grease). Citric acid is also often used in cleaning products and sodas or fizzy
Citric acid in a dry powdered form is commonly sold in markets and
groceries as "sour salt", due to its physical resemblance to table salt. It has
use in culinary applications where an acid is needed for either its chemical
properties or for its sour flavor, but a dry ingredient is needed and additional
flavors are unwanted (e.g., instead of vinegar or lemon juice).
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).
Citric acid is a slightly stronger acid than typical carboxylic acids because
the anion can be stabilized by intramolecular hydrogen-bonding from other protic
groups on citric acid.
Citrate, the conjugate base of citric acid is one of a series of compounds
involved in the physiological oxidation of fats, proteins, and carbohydrates to
carbon dioxide and water.
This series of chemical reactions
(aka"citric acid cycle", or
"tricarboxylic acid (TCA) cycle") is central to nearly all metabolic reactions,
and is the source of two-thirds of the food-derived energy in higher organisms.
The series of reactions is known by various names, including the . Click on genes, proteins and metabolites
below to link to respective articles.
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.
Where to buy gum rosin or pine rosin?
Where to buy Citric Acid?
Citric Acid products are available for sale at
www.ChemicalStore.com. For large orders please call in advance and verify the
availability, wholesale discounts and shipping options. If you cannot find any
product in the online store of your choice, please use the search option of the
store or call (973)405-6248 for further assistance.
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