|Melting Point||166 °C(dec.)|
Nicotinamide is a white needle-like crystalline or crystalline powder, odorless or slightly smelly, slightly bitter taste. Relative density 1.4, melting point 129-131℃. 1g Soluble in 1mL water, 1.5ml ethanol or 10mL glycerol, insoluble in ether. 10% aqueous solution has a PH of 6.5-Chemicalbook7.5. It has weak hygroscopicity. More stable, acid, alkali and high temperature in dry air, light and heat are stable, in alkaline or acidic solution heated to generate niacin. Rat oral LD502.5-3.5g/kg, ADI value is not specified (ECC, 1990).