Citric acid is not the same as ascorbic acid, vitamin C. They are both found in citrus fruits such as lemons, limes and oranges. Citric acid is in the carboxylic acid family. It is a crystalline granule that is water-soluble. Citric acid has many uses in food, cosmetic and industrial applications.
Foods
Citric acid is used as a flavoring for carbonated beverages, confections and jams or jellies. It is used in marinades for its tangy flavor and because the acid breaks down meat proteins, working as a meat tenderizer. Citric acid lowers pH, allowing lower heat for canning. It also bonds, or chelates to trace metals, preventing enzymatic oxidation. This chelation preserves the natural color of canned mushrooms, beans and corn, according to the APAC Chemical Corporation.
Citric acid is also a dietary supplement. Citric acid in the form calcium citrate is used as a calcium supplement.
Detergents
Citric acid is used in liquid detergents to increase the effectiveness of the cleaning solutions and their ability to break down grease and oil. It is used in both powder and liquid detergents. It does not negatively impact the environment.
Other detergent uses are in shampoos and soaps. Citric acid is used in hair products to adjust the pH of the hair and prevent buildup of chemical deposits on the hair.
Pharmaceuticals
The tart citrus flavor masks unpleasant medicinal flavors. This is why many pharmaceutical preparations contain citric acid. It is also a stabilizing agent, according to the APAC Chemical Corporation. It is a popular addition to antacids, dentifrices, bicarbonates and carbonates because of its effervescent effect.
Disinfectant Properties
Hemodialysis systems are subject to viruses and blood pathogens. Dialysis patients have been infected with blood-borne viruses and pathogenic bacteria, according to the Centers For Disease Control, CDC. It is crucial that these machines be properly disinfected. One form of sterilization for hemodialysis units for use with people infected with hepatitis B uses citric acid with heat to sterilize the equipment, according to the CDC.
Industrial Strength Cleaner
Citric acid is used in many industrial and home cleaning agents. The International Molybdenum Association recommends products containing citric acid to remove stains and adhesives from stainless steel. Citric acid kills bacteria and cuts through grease and stains. It is used to clean tile floors, countertops and various other household areas. It is environmentally safe, which makes it a good alternative to other caustic cleaners that can be noxious and toxic.
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