Nicotinic acid

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 22.05.2025

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Synonym(s)

CAS number: 59-67-6; Niacin; nicotinic acid; Nicotinic acid; pyridine-3-carboxylic acid

Definition
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Nicotinic acid is a vitamin component of the vitamin B complex(vitamin B3). It is found in all vital cells and is stored in the liver. Nicotinic acid is a component of various coenzymes (NAD, NADP) and is therefore of essential importance for the metabolism of proteins, fats and carbohydrates.

Chemically, nicotinic acid is a heterocyclic organic compound, a pyridine-3-carboxylic acid with the molecular formula: C6H5NO2. It consists of a pyridine ring substituted with a carboxy group (-COOH). The isomers of nicotinic acid are picolinic acid and isonicotinic acid.

Nicotinic acid forms a white, crystalline powder that is hardly soluble in ethanol, water and acetone, but soluble in boiling water. Nicotinic acid is also soluble in alkaline solutions, forming salts.

Effects
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When applied topically, the carboxylic acid leads to the release of prostaglandin D2 and thus to an increase in blood flow to the skin.

Cosmetics: Nicotinic acid compounds with fatty alcohols (ester formation) are mainly used in cosmetic formulations.

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Vitamin b3;

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Last updated on: 22.05.2025