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Chemical Structure and Properties of L-Lactic Acid

L-Lactic acid is a naturally occurring organic acid that is present in many food products and is also found in the human body. It is a key component of many metabolic processes and has a variety of uses in industry. This article will discuss the chemical structure and properties of L-Lactic acid and how it is used in various applications.


Structure of L-Lactic Acid

L-Lactic acid is an alpha hydroxy acid that has the molecular formula C3H6O3. It has a linear structure with two carboxylic acid groups and a hydroxyl group. The L-Lactic acid molecule is asymmetrical, with the hydroxy and carboxylic acid groups arranged in a specific spatial orientation. This gives L-Lactic acid its unique physical and chemical properties.


Physical Properties of L-Lactic Acid

L-Lactic acid(CAS NO 79-33-4) is a colourless, hygroscopic liquid with a sour taste and a slightly acidic odour. It is miscible with water and miscible with most organic solvents. At room temperature, L-Lactic acid is a liquid with a melting point of 45°C. It has a boiling point of 122°C and a density of 1.2 g/cm3.


Chemical Properties of L-Lactic Acid

L-Lactic acid is a weak acid with a pKa of 3.86. It is soluble in water and has a high dissociation constant. It can react with bases, reducing agents, and other organic compounds to form various products. L-Lactic acid is readily oxidized and can undergo condensation reactions.


Uses of L-Lactic Acid

L-Lactic acid is widely used in the food industry for its flavouring properties. It is also used as a preservative and for acidification in cheese and other dairy products. In the cosmetics industry, L-Lactic acid is used as an exfoliant in skin care products. It is also used in the manufacture of biodegradable plastics and in the medical field as an antiseptic.


L-Lactic acid is a naturally occurring organic acid that plays an important role in many metabolic processes. It has a linear structure with two carboxylic acid groups and a hydroxyl group. L-Lactic acid has a variety of uses in the food, cosmetics, and medical industries. It has a sour taste and a slightly acidic odour and is readily oxidized and can react with bases, reducing agents, and other organic compounds.


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