| CAS No.: | 5949-29-1; 77-92-9 |
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| Formula: | C6h8o7; C6h10o8 |
| EINECS: | 201-069-1 |
| Nutritional Value: | Non-nutritional |
| Certification: | BRC, ISO, FDA, HACCP |
| Packaging Material: | Laminated Material |
| Samples: |
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| Product Name | Citric acid |
| Application | Food Grade; Pharmaceutical Grade |
| Purity | 99.0%min |
| Type | Citric acid monohydrate; Citric acid anhydrous |
| Appearance | White crystal or crystalline powder |
Food industry
Citric acid is the organic acid with the largest yield produced by biochemical methods in the world. Citric acid and salts are one of the pillar products of fermentation industry, mainly used in the food industry, such as acid flavor agent, solvent enhancer, buffer, antioxidant, deodorant, flavor enhancer, gelling agent, toner, etc. [22].
In terms of food additives, it is mainly used in carbonated drinks, juice drinks, lactic acid drinks and other cool drinks and pickled products, and its demand is changed by the change of seasonal climate. Citric acid accounts for about 2/3 of the total consumption of sour agents. Adding citric acid to canned fruit can maintain or improve the flavor of the fruit, increase the acidity of certain fruits with low acidity when canning (reducing pH), weaken the heat resistance of microorganisms and inhibit their growth, and prevent the bacterial swelling and destruction that often occurs in canned fruits with low acidity. The addition of citric acid as a sour agent in candy is easy to harmonize with the fruit flavor. The use of citric acid in gel food such as paste and jelly can effectively reduce the negative charge of pectin, so as to make the hydrogen bond between pectin molecules to gel. In the processing of canned vegetables, some vegetables are alkaline reaction, the use of citric acid as a pH adjustment agent, not only can play a seasoning role, but also to maintain its quality. Citric acid has the properties of chelating and regulating pH value, which can increase the performance of antioxidant, inhibit enzyme activity and prolong the shelf life of food in the processing of frozen food.
Fine chemical industry
Citric acid is a kind of fruit acid, which can speed up the renewal of cutin, and is often used in lotions, creams, shampens, whitening products, anti-aging products, acne products and so on. Citric acid can be used as experimental reagent, chromatographic reagent and biochemical reagent in chemical technology. Used as a complexing agent, masking agent; To prepare buffer solution. The use of citric acid or citrate as washing aid can improve the performance of washing products, can quickly precipitate metal ions, prevent pollutants from reattaching to the fabric, and maintain the necessary alkaline washing; Dispersion and suspension of dirt and ash; It can improve the performance of surfactants and is an excellent chelating agent. It can be used as a reagent to test the acid resistance of building ceramic tiles. Citric acid - Sodium citrate buffer is used for flue gas desulfurization. Citric acid-sodium citrate buffer solution is a very valuable desulphurization absorber because of its low vapor pressure, non-toxic, stable chemical properties and high SO2 absorption rate.
Citric acid can be used as a formaldehyde-free dyeing finishing agent to improve the wearability of fabrics or to make fabrics with water-repellent and oil-repellent properties.
Medical field
Citric acid esters have been approved by the United States Food and Drug Administration as non-toxic plasticizers for polyvinyl chloride and cellulose plastic films for food packaging. Acetylated and butyrylated citrate esters can be used as blowing agent of methyl methacrylate polymer, stabilizer of acrylamide, initiator of polyamide binder, plasticizer of polyvinyl chloride, etc. In particular, butyl citrate and acetylated tributyl citrate are universally recognized as non-toxic plasticizers. In addition to non-toxic, in compatibility, extraction resistance, low volatility and other aspects of the performance is more superior. For example, acetylated trihexyl citrate and butyl acylated tributyl citrate can be used in the production of blood transfusion tubes and catheters with high hygienic requirements.
The combination of citric acid and 80 ºC temperature has a good effect on killing bacterial spores, and can effectively kill contaminated bacterial spores in the blood dialysis machine pipeline. Calcium ions must be involved in the formation of prothrombin activators and subsequent coagulation. Citrate ion and calcium ion can form a soluble complex which is difficult to dissociate, thus reducing the concentration of calcium ion in the blood and preventing blood coagulation.
Chemical production
Citric acid is a multifunctional precursor of many other organic compounds. Citric acid can be prepared by the thermal isomerization of citric anhydride, and the required citric anhydride can be obtained by the dry distillation of citric acid. Aconite can be synthesized by dewatering citric acid with sulfuric acid:
Acetone dicarboxylic acid can also be prepared by decarbonylation of citric acid in fuming sulfuric acid.
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