Acidity regulator Citric Acid Powder

CAS:77-92-9

MF:C6H8O7

MW:192.12

EINECS:201-069-1

Specification: 99% min Citric Acid Powder

Sample:Citric Acid Powder

Packaging:1kg/bag, 25kg/drum

Brand: Henrikang

Appearance: White

Storage: Store at -20°C

Shelf Life: 2 Years

Test Method: HPLC

Citric Acid Powder Usage and Synthesis.

Citric acid is widely distributed in nature and is found in the fruits of plants such as lemons, citrus, pineapples, currants, raspberries, and grape juice and in the bones, muscles, and blood of animals.

Synthetic citric acid is produced by fermenting sugar, molasses, starch, grapes and other sugary substances, and can be divided into anhydrous and hydrate.

Pure citric acid is a colourless transparent crystal or white powder, odourless, with an attractive sour taste. The translucent colourless crystals obtained from hot concentrated aqueous solution are anhydrous and have a melting point of 153°C. The acid can be used as an anhydrous substance.

Translucent colourless crystals obtained from cold aqueous solution are monohydrate, density 1.542. softens at 75°C, melts at about 100°C.

Monohydrate can lose water in dry air. It is strong organic acid. Soluble in water, ethanol and ether. Used in the manufacture of drugs, soft drinks, candy, etc., also used as a metal cleaner, mordant and so on.

Uses of Citric Acid.

Used as laboratory reagent, chromatographic reagent and biochemical reagent, also used in the preparation of buffer solution. Used in the food industry especially as an acidifier, PH buffer, and other compounds together as a preservative.

In the detergent industry, it is an ideal substitute for phosphate. Boiler chemical cleaning acid detergent, boiler chemical cleaning rinse agent.

Mainly used as food acidifier, also used in the preparation of pharmaceutical coolants, detergents with

Citric acid is the most versatile and widely used acidifier. It has high solubility and strong chelating ability to metal ions, and can be used in all kinds of food, according to the production needs of the appropriate amount of use.

In addition, it can be used as antioxidant synergist, synergist of compound potato starch bleaching agent and preservative.

It is widely used as acidifier and drug additive for food and beverage.

It can also be used as raw materials and additives for cosmetics, metal cleaners, mordants, non-toxic plasticisers and boiler anti-scaling agents. Its main salt products are sodium citrate, calcium and ammonium salts, etc. Sodium citrate is an anticoagulant for blood, and ferric ammonium citrate can be used as a blood tonic drug.

Characteristic of Citric Acid.

Structurally citric acid is a tricarboxylic acid and as such has similar physical and chemical properties to other carboxylic acids. When heated to 175 °C it decomposes to produce carbon dioxide and water, with some white crystals remaining. Citric acid is a strong organic acid with 3 H+ that can be ionised; it can be decomposed into a variety of products by heating and reacts with acids, bases and glycerol.

Prodct Method of Bulk Citric Acid Powder.

Citric acid is mainly produced by fermentation method, and its raw materials can be molasses, sucrose, sweet potato and petroleum hydrocarbons and other carbohydrates.

Generally, it is produced by fermentation of fungi, which can be divided into two categories of surface fermentation and deep fermentation according to the fermentation method. Surface fermentation is the early production method, which uses certain Penicillium or Aspergillus niger as the strain; deep fermentation also uses Aspergillus niger as the strain, which generates small spherical filamentous fungal aggregates in the process of fermentation, and it should be avoided to produce long and thin filamentous fungal bodies, and the conditions of fermentation are pH 1.5-2.8, and at the same time, sterile air and stirring need to be introduced. The fermentation condition is pH 1.5-2.8, meanwhile, the sterile air should be passed in and stirred, after fermentation, the filtrate should be filtered to remove the filamentous fungus body and the residual solid residue, and the filtrate should be neutralised with calcium carbonate to obtain calcium citrate, and then neutralised with concentrated sulphuric acid to obtain the crude citric acid, and then refined, concentrated and crystallised with ion exchange resin to obtain the finished product.

The deep fermentation method is the main method, accounting for about 80 per cent of the production of the fermentation method.