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High purity lactic acid

The company produced Xinghan high purity lactic acid (lactic acid content according to customer demand), is corn straw or corn starch as raw material, the use of fermentation refining technology production. This product is colorless clear viscous liquid, slightly sour taste, with hygroscopic, aqueous solution showed acidic reaction, and water, ethanol or ether can be arbitrarily mixed, insoluble in chloroform.

Key words:

High purity lactic acid


Description

high purity lactic acid

Basic information

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

Molecular formula: CH3CHOHCOOH

Molecular weight: 90.08

Product Description

The company produced Xinghan high purity lactic acid (lactic acid content according to customer demand), is corn starch or corn straw as raw material, the use of fermentation refining technology production. This product is colorless clear viscous liquid, 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

95.0 of w/% indication -105.0

L-lactic acid in total lactic acid content

w/% ≥99.0

residue on ignition

w/% ≤ 0.01

Chloride (in C1)

w/% ≤ 0.001

Sulfate (as SO4)

w/% ≤ 0.001

Iron salt (calculated as Fe)

w/% ≤ 0.0001

Cyanide

Mg/kg ≤ 1.0

Citric acid, oxalic acid, phosphoric acid, tartaric acid

Oxalic acid, phosphoric acid, tartaric acid through the experiment

reducing sugar

by experiment

easy carbon compound

by experiment

Lead (Pb)

Mg/kg ≤ 0.5

Arsenic (As)

Mg/kg ≤ 1.0

Chroma

APHA ≤ 10

Heating color (180 ℃ 2hs)

APHA ≤ 10

Mercury (Hg)

Mg/kg ≤ 1

volatile fatty acids

by experiment

Methanol

w/% ≤ 0.05

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 high purity lactic acid (lactic acid content according to customer demand), is corn straw or corn starch as raw material, the use of fermentation refining technology production. This product is colorless clear viscous liquid, slightly sour taste, with hygroscopic, aqueous solution showed acidic reaction, and water, ethanol or ether can be arbitrarily mixed, insoluble in chloroform.

 

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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 pharmaceutical, wine, food, beverage, paper, leather, cigarette, paint, ink, electroplating and plastic industry and oil pipeline corrosion prevention. Because lactic acid is easily absorbed by the human body, it is called "muscle lactic acid", which is a flashing star in the field of biochemical and fine chemical industry.

Food field

Meat and poultry products

1. Lactic acid, widely found in meat. L-sodium lactate, can capture a large amount of water in food, which can prevent 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, thereby preventing the growth of pathogenic microorganisms, preventing the deterioration of radish, cabbage, cucumber, onion and other vegetables pickled in salt water, ensuring the stability of the product and allowing the taste to be improved.

3. Beverage and winemaking

Lactic acid has a mild and moderate sour taste and can be used as a sour agent in well-formulated soft drinks and fruit 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, improve the quality of beer, but also increase the flavor of beer and extend 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 ingredient in dairy products. It has a good taste and is a popular dairy acid and pH regulator. Calcium lactate and iron lactate, magnesium, zinc, etc. can be used to strengthen the minerals in milk and beverages, and will not affect the flavor and taste of the product, and there will be no protein precipitation.

5. Nutrition and health food

Calcium lactate, magnesium, zinc, and iron can strengthen minerals in sports health drinks, fruit juices, foods 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, can make the 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. Buffer lactic acid also acts on the protein in the flour, which can make the gluten form a rich mesh structure and make the taste soft; 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 as an injection in the field of medicine. Its main function is to replenish body fluids and regulate electrolyte balance in the human body to relieve dehydration caused by diarrhea and poisoning caused by diabetes and gastritis.

2. Chiral intermediates

Lactic acid can be used as a starting material for the synthesis of chiral medicine. Lactate can be used as an intermediate to participate in the synthesis and improve efficacy.

3. Medical materials

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 changed into carbon dioxide and water. Therefore, polylactic acid has good degradability and can be made into various medical materials for different purposes, such as degradable sutures, fracture internal fixation, tissue repair materials and filling materials for diagnosis and treatment of retinal detachment. In addition, because polylactic acid itself is easy to form a film, it can be used as an ideal material for pharmaceutical delivery and is widely used in the sustained/controlled release system of drugs.

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 complexing constant for nickel and 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 the deposition rate can be controlled to ensure uniform and fine plating and stable plating solution. Lactic acid has the ability of synergy, and can form binary or multiple 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 high boiling point solvent, which has good solubility and unique solubility for grease and polymer dirt, and has environmental and toxicological properties. Can be used alone or can be added to the cleaning solvent formula for degreasing and a variety of 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 the 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.

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