Chiral Lactic Acid (Lactic Acid Content 90%)

　　Basic information

Chemical name: L(S)-2-hydroxypropionic acid

Molecular formula: CH3CHOHCOOH

Molecular weight: 90.08

　　Product Description

The company produced Xinghan chiral grade lactic acid (lactic acid content 90%), is corn starch or corn straw as raw materials, the use of modern fermentation refining technology production. This product is colorless clear viscous liquid, no bad smell, slightly sour taste, with hygroscopic, aqueous solution showed acidic reaction, and water, ethanol or ether can be arbitrarily mixed, insoluble in chloroform.

　　Technical indicators (reference standard: GB)

 

Identification test	Aqueous solution is acidic, lactate is positive reaction
Lactic acid content, w/%	95.0 of label value -105.0
L-lactic acid to total lactic acid content, w/%	≥ 99.5
Residue on ignition, w/%	≤ 0.05
Chloride (as C1),w/%	≤0.001
Sulphate (as SO4),w/%	≤0.001
Iron salts (as Fe),w/%	≤ 0.0005
Cyanide, mg/kg	≤ 1.0
Citric acid, oxalic acid, phosphoric acid, tartaric acid	by experiment
reducing sugar	by experiment
easy carbon compound	by experiment
鉛(Pb)，mg/kg	≤2.0
砷(As)，mg/kg	≤ 1.0
Chroma, APHA	≤ 15
Heating color (180 ℃ 2hs),APHA	≤ 15
volatile fatty acids	by experiment
Methanol, w/%	≤ 0.20
Heavy metals (as Pb),mg/kg	≤ 5
ether insoluble	by experiment
Calcium salt, mg/kg	≤ 1
Density (20 ℃),g/ml	1.200-1.220

　Product Description

The company produced Xinghan chiral lactic acid (lactic acid content of 90%), corn straw or corn starch as raw materials, the use of modern fermentation refining technology production. This product is colorless clear viscous liquid, no bad smell, slightly sour taste, with hygroscopic, aqueous solution showed acidic reaction, and water, ethanol or ether can be arbitrarily mixed, insoluble in chloroform.

The structural formula of lactic acid is CH3CHOHCOOH, the molecular formula is C3H6O3, the relative molecular mass is 90.08, and the molecule has two functional groups of hydroxyl (OH) and carboxyl (COOH). It is a kind of hydroxy carboxylic acid that exists widely in nature, and it is also a simple hydroxy acid. Lactic acid is widely found in animals, plants and microorganisms.

　　Lactic acid and lactate applications

The scientific name of lactic acid is a-hydroxy propionic acid, which is widely used in pharmaceuticals, wine, food, beverages, health products, papermaking, tanning, cigarettes, paints, inks, electroplating and plastics industries, and oil pipeline corrosion protection. Because lactic acid is easily absorbed by the human body, it directly participates in the metabolism of the body and promotes digestion. It is called "muscle lactic acid" and is a flashing star in the field of biochemical and fine chemical industries.

Food field

1. Meat and poultry products

Lactic acid is an organic acid that is widely found in meat. L-sodium lactate, can capture a large amount of free water in food, has the effect of reducing water activity, which can inhibit the growth of microorganisms, so it is widely used in meat and poultry food processing industry, can extend the shelf life of products. In addition, it can enhance and maintain the flavor of the product.

2. Vegetable pickled products

Lactic acid can adjust the pH value, so that it can control fermentation and inhibit the growth of pathogenic microorganisms, effectively prevent the spoilage of radish, cabbage, cucumber, onion and other vegetables pickled in salt water, ensure the stability of the product and improve the taste.

3. Beverage and winemaking

Lactic acid has a mild and moderate tart taste and can be used as a preferred acidulant for well-formulated soft drinks and juices. Calcium L-lactate, iron, magnesium, zinc, etc. are used as mineral fortifiers for fruit juices, health drinks and soft drinks. When brewing beer, adding appropriate amount of lactic acid can not only adjust the pH value to promote saccharification, but also increase the flavor of beer and prolong the shelf life. In liquor, sake and fruit wine, it is used to adjust pH, prevent the growth of miscellaneous bacteria, and enhance sour taste and refreshing taste.

4. Dairy products

Lactic acid is an inherent component of dairy products, it has a natural taste and good antibacterial effect, is a very popular dairy products acid agent and pH regulator. Calcium lactate and iron lactate, magnesium, zinc, etc. can be used to fortify minerals in milk and fermented milk beverages, and will not affect the flavor and taste of the product, nor will protein precipitation occur.

5. Nutrition and health food

Calcium lactate, magnesium, zinc, and iron can strengthen minerals in sports health drinks, fruit juices and baby products. They have good water solubility, moderate taste, and are easily absorbed and utilized by the human body. They can improve human body functions and enhance explosive power.

6. Pasta products

Lactic acid is a natural fermentation of organic acids, can make bread has a unique taste. Lactic acid can also synthesize sodium and calcium lactoyl esters, which are used as emulsifiers in bread. Calcium lactate as a flour improver can improve raw materials, improve mechanical resistance, taste, and prevent aging. Buffering lactic acid also plays a role in the protein in flour, which can make gluten form a rich mesh structure, increase the volume, especially make the taste better and prevent aging; it can also make the noodles elastic, increase the elasticity of the surface, have a smooth, transparent appearance, and can improve the taste and flavor.

7. Candy

Buffered lactic acid is a buffer system formed by mixing lactic acid and sodium lactate in a certain proportion. It has a mild sour taste. After adding buffered lactic acid to candy, a lower sugar conversion rate can be obtained, thus prolonging the shelf life. Powder lactic acid can make the appearance of soft candy better and greatly reduce the occurrence of surface moisture. Sodium lactate can play a role in reducing sugar conversion and protecting gel. Calcium lactate can also be used in chewing gum, to stabilize the colloid, adjust the role of pH, at the same time, because calcium ions can prevent the loss of minerals in the teeth, can achieve the effect of healthy teeth.

medical field

1. Oral Care

Sodium lactate is mainly used in the medical field as an injection. Its main function is to replenish body fluids and regulate the electrolyte balance in the human body to relieve dehydration caused by diarrhea and poisoning caused by diabetes and gastritis.

2. Chiral intermediates

Lactic acid with an optical purity of more than 98% can be used as a starting material for the synthesis of chiral drugs. Lactate can be used as an intermediate to participate in the synthesis and improve efficacy.

3. Pharmaceutical materials and drug sustained release

Polylactic acid is a condensation polymer of lactic acid, which is hydrolyzed into lactic acid in human tissues. Lactic acid is a metabolic product of human body and can be further decomposed into carbon dioxide and water. Therefore, polylactic acid is non-toxic and has good degradability. It can be made into a variety of medical materials for different purposes, such as degradable surgical sutures, fracture internal fixation, tissue repair materials and filling materials for the treatment of retinal detachment. In addition, since polylactic acid itself is metabolically safe and easy to form a film, it can be used as an ideal material for long-lasting drug delivery and is widely used in sustained/controlled drug release systems.

4. Mineral fortification

Lactate (calcium, iron, magnesium, zinc, etc.) can be made into tablets or powders for various mineral deficiencies due to its high biological absorption and utilization rate and good taste.

Industrial field

1. Electroless nickel plating complexing agent

Lactic acid has a complex constant to nickel, more than 97% of nickel ions in the lactic acid-nickel ion system are in the state of complex ions, and the content of free nickel ions is less than 3%, so lactic acid is one of the commonly used complexing agents for electroless nickel plating. Compared with other complexing agents, lactic acid has strong stability in the plating solution and can effectively control the deposition rate to ensure uniform and fine plating and stable plating solution. In addition, it is also effective for suppressing the precipitation of nickel phosphite generated during the electroless nickel plating operation. Lactic acid has good synergy ability, and can form binary or multi-complex complexing agents with sodium citrate, malic acid, succinic acid and other complexing agents, further meeting the needs of chemical nickel plating industry for complexing agents.

2. Paint and coating industry

Lactic acid can be applied to the binding system of water-based coatings as a pH regulator and a synthetic agent. Such as: the coating of the electrodeposit. Methyl lactate and butyl lactate are synthetic agents for paints, coatings and resins. Butyl lactate is widely used as a brightener in painting and baking of automotive appliances.

3. Tobacco

Lactic acid can maintain tobacco humidity, remove impurities in tobacco, change taste, neutralize nicotine nicotine, reduce harmful components to human body, and improve tobacco quality. Lactic acid can be used to synthesize L-menthyl lactate, which is used as a raw fluid flavoring agent for tobacco essence, and has the effect of shielding bitter taste and making smoking mouth fresh. Potassium lactate is a commonly used coke reducing combustion aid. Magnesium lactate and calcium lactate can also be used as tobacco additives to improve gray gray matter.

4. Cleaning agent

Lactate is a kind of high boiling point solvent with good performance and safety. It has good solubility and solubility for oil and polymer dirt, and has environmental protection and toxicological properties. Can be used alone or can be added to the cleaning solvent formula for degreasing and a variety of precision mechanical cleaning and surface coating before cleaning.

5. Tannery and textile industry

In the tanning industry, lactic acid can remove the lime and calcium in the leather, making the leather soft and fine, thus making high quality leather. In the textile industry, lactic acid is used to treat fibers, which can make them easy to color, increase luster, and make them soft to the touch.

6. Alcohol industry

Ethyl lactate is a colorless volatile liquid with special rum, fruit and cream flavors. As an excellent solvent with unique properties, it is widely used as a flavoring agent for liquor and fruit wine.