Systematic name	3-Pyridinecarboxylic acid
Chemical formula	C6H5NO2
Molecular mass	123.11 g/mol
Density	x.xxx g/cm3
Melting point	236.6 °C
Boiling point	xx.x °C
CAS number	*
SMILES	xxxx
Chemical infobox

Niacin, also known as nicotinic acid or vitamin B3, is a water-soluble vitamin whose derivatives such as NADH, NAD, NAD⁺, and NADP play essential roles in energy metabolism in the living cell and DNA repair. The designation vitamin B3 also includes the amide form, nicotinamide or niacinamide. Severe lack of niacin causes the deficiency disease pellagra, whereas a mild deficiency slows down the metabolism decreasing cold tolerance. The recommended daily allowance of niacin is 2-12 mg a day for children, 14 mg a day for women, 16 mg a day for men, and 18 mg a day for pregnant or breast-feeding women.

Discovery

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Nicotinic acid was first discovered from the oxidation of nicotine. When the properties of nicotinic acid were discovered, it was thought prudent to choose a name to dissociate it from nicotine and to avoid the idea that either smoking provided vitamins or that wholesome food contained a poison. The resulting name 'niacin' was derived from nicotinic acid + vitamin.

Industrial use

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Nicotinic acid reacts with hemoglobin and myoglobin in meat to form a brightly coloured complex, and thus has been used as a food additive, typically to improve the colour of minced (ground) meat. Niacin is licensed as a food colouring agent in some, non-European, countries.

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Taking aim at NMSC: Nicotinic acid receptor potential therapeutic target in nonmelanoma skin cancer http://bit.ly/7TSat3 #dermatology
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Taking aim at NMSC: Nicotinic acid receptor potential therapeutic target in nonmelanoma skin cancer http://bit.ly/7TSat3 #dermatology

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