Citric acid

Colorless crystalline powder or transparent crystals

Citric acid is a colorless crystalline powder or transparent crystals with a sour taste. It occurs naturally in citrus fruits and is widely used in food, cosmetic, pharmaceutical, and cleaning products for its versatile properties such as preservative, flavoring, chelating, and descaling.

Oil Field Drilling

Citric acid can be used as an ingredient in drilling fluid additives, where it functions as a chelating agent, helping to remove metal ions from the drilling fluid and prevent their interference with the drilling process. Citric acid can also be used in drilling mud formulations to adjust the pH and improve fluid properties. Additionally, citric acid may find applications in drilling waste management, where it can be used as a biodegradable acid for neutralizing drilling muds and managing drilling cuttings.

Water Treatment

Citric acid, a weak organic acid, is used in water treatment primarily as a pH adjuster and chelating agent. It helps in balancing the pH levels of water, making it safer for consumption and suitable for various industrial processes. Additionally, its chelating properties allow it to bind with metal ions, effectively reducing water hardness and preventing scale formation in pipes and machinery, thereby enhancing the efficiency and longevity of water treatment systems.

Food Additives

Citric acid is widely used in the food industry as a food preservative, flavoring agent, and acidity regulator. It is commonly used in beverages, jams, jellies, and canned fruits for its sour taste and ability to enhance flavor. Citric acid also acts as a natural preservative, extending the shelf life of food products. In addition, it is used in bakery and confectionery products to regulate acidity levels and improve dough quality. Its chelating properties also make it useful in preventing discoloration in fruits and vegetables. Citric acid is recognized as safe for consumption by regulatory authorities, making it a versatile and commonly used ingredient in the food industry.


Citric acid finds applications in the pharmaceutical industry as an excipient in drug formulations. It can be used as a pH-adjusting agent to regulate the acidity of pharmaceutical formulations, as well as a chelating agent to improve the stability and effectiveness of certain medications. Citric acid is also used in the formulation of effervescent tablets and powders, where it reacts with other ingredients to produce carbon dioxide gas, leading to a fizzing effect. Furthermore, citric acid may have potential applications in drug delivery systems and pharmaceutical manufacturing processes, although further research and development would be needed to explore its full potential in this field.

CAS No.: 77-92-9 (Anhydrous)
CAS No.: 5949-29-1 (Monohydrate)


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