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Citric Acid Monohydrate Acidity Regulators

Monohydrate citric acid which is a form of citric acid with one molecule of water of crystallization. It is one of the two main forms of commercial citric acid, with the molecular formula C6H8O7·H2O and a molecular weight of approximately 210.14. It is usually a white, transparent or semi-transparent crystal, or granular or fine powder, odorless, with a strong sour taste and a slightly astringent aftertaste. It contains 8.58% water of crystallization, has a melting point of 70-75°C, and a relative density of 1.542 at 20°C. If left in dry air for a long time, it will lose its water of crystallization and effloresce. The crystal is a rhombic prism, and the critical temperature for its transformation into anhydrous citric acid is 36.6 ± 0.15°C. It is highly soluble in water, soluble in ethanol, slightly soluble in ether, and insoluble in benzene, toluene, carbon disulfide, carbon tetrachloride, and fatty acids. It has strong acidity and can react with many substances such as acids, bases, glycerol, salts, and metal ions. When heated, it can decompose into various products.

The industrial production process of monohydrate citric acid is as follows: Firstly, the citric acid fermentation liquid is separated into clear liquid through solid-liquid separation. Then, the clear liquid is purified by calcium salt method, acidolysis method and decolorization method. After heating, concentrating and crystallizing, anhydrous citric acid is obtained. The concentrated liquid separated from anhydrous citric acid is repeatedly subjected to cooling crystallization, centrifugal separation and drying to obtain monohydrate citric acid crystals. Monohydrate citric acid has a wide range of applications: it is used as an acidulant, flavoring agent and preservative in the food and beverage industry; as an antioxidant, plasticizer and key component of detergents in the chemical field; to adjust the pH balance and stabilize the formula in the cosmetics industry; and as a pharmaceutical excipient in the medical field.

Monohydrate citric acid is highly safe and can be completely decomposed by both adults and infants. The US Food and Drug Administration (FDA) has listed it as a GRAS (Generally Recognized As Safe) edible substance, and there are no restrictions on its use in food in China. However, it should be noted that due to its strong acidity, monohydrate citric acid can cause irritation to the eyes, skin and respiratory tract.

It is mainly used in the food and beverage industry as an acidulant, flavoring agent, preservative and antioxidant. It is also used in the chemical industry, cosmetics industry and detergent industry as an antioxidant, plasticizer and detergent, etc.

Product category

food additives

natural plant oil

flavors & fragrances

raw materials of fine chemicals

			Guangzhou Zl0 Chemical Co., Ltd. was founded in the spring of 2005.
			We specialize in the distribution business of food additives,
			cosmetic chemicals and specialty chemicals. Our main products include preservatives,
			acidity requlators, sweeteners, antioxidants, thickeners, emulsifiers, flavors,nutrition enhancers, vitamins and food pigment etc.
			Products are widely used in food, cosmetic, toy, pigment, detergent, rubber and electroplating industries.etc.

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