In shortCitric acid is an organic acid used for acidulation, pH adjustment, and chelation. It comes in anhydrous (CAS 77-92-9) and crystalline (monohydrate) forms, chosen by hygroscopicity and use. It is widely used in beverages, processed foods, and supplements.
What it is
Citric acid is an organic acid with a refreshing sourness, used for multiple purposes: imparting acidity, pH adjustment, and chelating metal ions.
Anhydrous vs. crystalline (monohydrate)
Anhydrous has low moisture and is stable; crystalline (monohydrate) is easy to handle and chosen for cost. Consider hygroscopicity, tableting, and formulation stability.
Sourcing points
Confirm form (anhydrous/crystalline), particle size, and spec. See FONTIA’s acidulants & pH adjusters.
FAQ
Anhydrous or crystalline—which to use?
Anhydrous for stability; crystalline for cost and ease of handling. Decide by use.
Can it be used for pH adjustment?
Yes. Beyond imparting acidity, it is used for pH adjustment and chelation.
Caution for tableting?
Mind hygroscopicity and adjust particle size and formulation (lubricants, etc.).