Niacin (Vitamin B3) Powder
Other Names: Pyridine-3-carboxylic acid, Nicotinic acid, Bionic, Vitamin B3

CAS Number: 59-67-6
Sum Formula: C₆H₅NO₂
Molar Mass: 123.11 g/mol
Appearance: White to slightly off-white crystalline powder

Niacin is a simple water-soluble B-vitamin compound consisting of a pyridine ring bearing a carboxyl group at the 3-position. It is widely used in chemical and material science applications, especially where redox-active pyridine derivatives are required.

Chemical and Physical Properties
Density: 1.48 g/cm³
Melting Point: 236–239°C
Boiling Point: Decomposes before boiling
Solubility in Water: Freely soluble (~15 g/L at 20°C)
Solubility in Other Solvents: Slightly soluble in ethanol; practically insoluble in ether and chloroform
Odor: Odorless

Applications
Organic Synthesis: Used as a precursor in the preparation of nicotinamide derivatives and pyridine-based compounds.
Coordination Chemistry: Acts as a ligand in the formation of metal complexes for catalysis and materials science.
Redox Research: Studied for its role in redox reactions and electron transfer processes.
Polymer Chemistry: Investigated for the preparation of functionalized polymeric materials containing pyridine groups.
Analytical Chemistry: Applied as a reference compound in vitamin B3 quantification assays.

Safety

Signal Word: Warning

Handling and Storage
Storage Conditions: Store in a tightly sealed container in a cool, dry, and well-ventilated place. Protect from light and moisture.
Handling Precautions: Avoid dust formation and direct contact with skin and eyes. Use standard PPE and safe laboratory practices.