L-lactic acid is a chemical substance with the molecular formula of C3H6O3. It is an optical isomer of lactic acid. It is an organic acid refined by biological fermentation using corn starch as raw material. It is a colorless clear viscous liquid. The aqueous solution shows acidic reaction. L-lactic acid can be freely mixed with water, ethanol or ether, and is insoluble in chloroform. Because of its left-handed characteristics, it has good biological compatibility, can be compatible with mammals, can directly participate in human metabolism, without any side effects, and is widely used in food, medicine and other fields.
CAS NO : 79-33-4
The application fields of L-Lactic Acid range from biodegradable plastics, food and beverage additives, to pharmaceuticals and personal care products.
1. Biodegradable plastics
L-Lactic acid is a key raw material for the production of polylactic acid (PLA), an important biodegradable plastic widely used in packaging materials, disposable tableware, agricultural films, and 3D printing.
2. Food and Beverage Industry
In the food and beverage industry, L-lactic acid is used as a pH adjuster, preservative and sour agent. As lactic acid for pH adjustment, it can extend the shelf life of food while maintaining its flavor and quality. L-Lactic acid additive is widely accepted by the food industry.
3. Pharmaceutical industry
In the pharmaceutical industry, L-lactic acid is used to produce absorbable sutures and drug delivery systems.
4. Personal care products
L-lactic acid is widely used in personal care products as an ingredient to adjust skin pH, moisturize and exfoliate. Commonly found in cleansers, skin creams and sunscreens.
5. Cleaning and disinfecting products
L-lactic acid is used in the formulation of environmentally friendly cleaning and disinfecting products due to its natural antiseptic properties. These L-lactic acid-based products are not only friendly to the human body and the environment, but also effectively inhibit bacteria and viruses.
Lactic acid is the smallest chiral molecule in nature, and the carboxyl group in the molecule α The position carbon atom is an asymmetric carbon atom with L (+) and D (-) configurations. L-lactic acid is left-handed type, D-lactic acid is right-handed type, L-lactic acid and D-lactic acid are mixed in equal proportion to form racemic DL-type. The physical and chemical properties of D-lactic acid and L-lactic acid are the same except for their optical activity, but the physical properties of DL-type are different from them, which is shown in that their melting point and heat of melting are lower than those of single D or L configuration.
D-lactic acid is dextral lactic acid, which cannot be absorbed by human body; L-lactic acid is L-lactic acid that can be absorbed by human body; DL-lactic acid is mixed rotational lactic acid. D-lactic acid and L-lactic acid are optical isomers of each other. DL-lactic acid is their mixture.
L-lactic acid is used for food, as an acid and preservative, as well as medical raw materials, disinfection and sterilization; The 79 33 4 industrial grade L-Lactic Acid is used for pesticide, feed and cigarette to keep moisture and remove odor; It can also be used for alcohol and condiments, adjusting PH value and promote fermentation; Etc.
Lactic acid contains L-lactic acid; D-lactic acid; DL-lactic acid,
L-lactic acid is left-handed type, D-lactic acid is right-handed type, L-lactic acid and D-lactic acid are mixed in equal proportion to form racemic DL-type. Therefore, lactic acid contains L-lactic acid, while L-lactic acid is not equal to lactic acid.
Security. L-lactic acid, Cas No 79 33 4, can be absorbed by human body and can be used in lactic acid food additive.
En 
