The main difference between anhydrous citric acid and monohydrate is that anhydrous citric acid lacks crystallization water, while citric acid monohydrate has a water molecule associated with a citric acid molecule.
Citric acid is a weak organic acid, so we can find it naturally in citrus fruits. Manufacturers produce large amounts of citric acid annually, as it has many uses, especially as an acidifier, as a flavoring, and as a chelating agent.
This compound can be present as anhydrous (without water) or as a monohydrate.
What is anhydrous citric acid?
Anhydrous or dry citric acid is the anhydrous form of citric acid. The appearance of this combination is colorless and odorless. It does not have water in anhydrous and granulated form and we can produce this compound through crystallization from hot water.
Anhydrous citric acid is formed from a monohydrate state at a temperature of 78 ° C. The density of the anhydrous form is 1.665 grams per cubic centimeter. It melts at 156 ° C and the boiling point of this compound is 310 ° C. The chemical formula of this compound is C6H8O7 and its molar mass is 192.12 g / mol.
What is monohydrate citric acid?
Citric acid monohydrate contains citric acid water. It contains a molecule of water associated with a molecule of citric acid. We call this water crystallization water. This form of citric acid is formed through the crystallization of cold water.
The monohydrate form becomes anhydrous at 78 ° C. The density of this compound is 1.542 grams per cubic centimeter. The chemical formula of this compound is C6H8O7.H2O and its molar mass is 210.138 g / mol. The melting point is 135 degrees Celsius and the boiling point is 310 degrees Celsius.
What is the difference between anhydrous citric acid and monohydrate?
Anhydrous citric acid is the anhydrous form of citric acid, Citric acid monohydrate is a juicy form of citric acid. This is the main difference between dehydrated citric acid and monohydrate.
In addition, the chemical formula of anhydrous citric acid is C6H8O7. The molar mass of this compound is 192.12 grams per mole. We can produce this compound through crystallization from hot water.
On the other hand, the chemical formula of citric acid monohydrate is C6H8O7.H2O and its molar mass is 210.138 g / mol. In addition, we can produce this compound through crystallization from cold water.
Summary
Citric acid is available in both dehydrated and single hydrated forms. The difference between anhydrous citric acid and monohydrate is that anhydrous citric acid lacks crystallization water, while citric acid monohydrate has a water molecule associated with a citric acid molecule.
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