Factory Supply Good Quality Lactic Acid

Product Name: Lactic Acid

Other Name: 2-Hydroxy propionic acid

CAS NO.: 50-21-5(DL), 79-33-4(L), 10326-41-7(D)

MF/Formula: C3H6O3

Lactic Acid is an organic compound with the formula CH3CH(OH)CO2H. In its solid state, it is white and water-soluble. In its liquid state, it is clear. It is produced both naturally and synthetically.

Lactic acid is found primarily in sour milk products, such as koumiss, laban, yogurt, kefir, some cottage cheeses, and kombucha. The casein in fermented milk is coagulated (curdled) by lactic acid. Lactic acid is also responsible for the sour flavor of sourdough breads.

Instruction

Lactic acid is an important organic acid, the second organic acid in production and consumption after citric acid. According to some data, the consumption of lactic acid accounts for about 15% of the total consumption of organic acids. In recent years, due to the expanded application of L-lactic acid in biodegradable plastics, its demand will increase at a relatively high rate. Some people predict that it may catch up with or exceed citric acid in a few years. Lactic acid widely exists in nature and is found in living organisms.

Sodium lactate is used in medicine to prevent acidosis. Ferric lactate and calcium lactate are raw materials for the pharmaceutical industry. Ethyl lactate is a spice. Butyl lactate is a good additive for paint and an important raw material for plasticizers and modifiers in the plastics industry; It is used as a rust remover in the electroplating industry.

Physical and chemical properties

The pure product is a colorless liquid, and the industrial product is a colorless to pale yellow liquid. Odorless and hygroscopic. The relative density is 1.2060 (25/4°C). The melting point is 18°C. The boiling point is 122°C (2kPa). Refractive index nD (20°C) 1.4392. It can be miscible with water, ethanol and glycerol, and its aqueous solution is acidic, with pKa=3.85. Insoluble in chloroform, carbon disulfide and petroleum ether. It is heated and decomposed under normal pressure, and when it is concentrated to 50%, part of it becomes lactic anhydride, so the product often contains 10% to 15% lactic anhydride. Due to the hydroxyl and carboxyl groups, esterification reaction can occur under certain conditions, and there are three kinds of products.

Toxicity: Rat oral LD50 is 3.73g/kg body weight; ADI has no limit.

Lactic acid has two isomers: D-form and L-form [1].

The rats were divided into three groups, each group was given DL-type, D-type and L-type lactic acid at a dose of 1.7g/kg body weight, and three hours after oral administration, the anatomical examination showed that DL-type lactic acid could increase glycogen in the liver , 40%~95% is absorbed and transformed within 3 hours; D-type and L-type lactic acid increase lactate in blood and excrete it through urine.

Use

1. It is mainly used in spices, food and beverage industries, and is also a raw material for pharmaceutical, chemical, leather, printing and dyeing industries.

2. Used as experimental reagents, edible flavors, preservatives, plasticizers and adhesives, and also used in the pharmaceutical industry.

3. Lactic acid is an important sour agent for the use of antibacterial synergistic drugs, and has a specific astringent sour taste. Chemicalbook. It can be used in all kinds of food, and it can be used in moderation according to production needs. It also has a strong bactericidal effect and can prevent the growth of miscellaneous bacteria.

4. Lactic acid is an important sour agent with a specific astringent sour taste. It can be used in all kinds of food, and it can be used in moderation according to production needs. It also has a strong bactericidal effect and can prevent the growth of miscellaneous bacteria.

5. For complexometric titration analysis of calcium, magnesium and aluminum; for measuring the binding capacity of carbon dioxide in plasma; for the determination of copper and zinc.

6. Food acids and spices, preservatives, preparation of lactic acid salts, plasticizers, complexometric titration analysis, magnesium and aluminum, used to measure the binding force of carbon dioxide in plasma, and to determine copper and zinc.