Ascorbic Acid - White Crystalline Powder With Assay 99.0%-100.5% | Odorless, Highly Soluble In Water, Clear Solution

Commodity Name:Ascorbic Acid (Vitamin C)
Molecular Formula:C6H8O6
Molecular Weight:176.12
Properties:white monoclinic system crystals or crystalline powder.
Melting point 190 . C -192 C, odorless but tastes sour. Color turns light yellow after long time storage. The product is easily soluble in water, slightly soluble in ethanol , insoluble in chloroform and ether and its water solution appears acidic. The PH value of the 5% water solution is 2.1-2.6 and the ratio rotation of the 10% (W/V) water solution is +20.5 . -+21.5 .

Specification
Appearance: White or almost white crystalline powder
Identification: Positive reaction
Melting point: about 190 DC
pH: 2.1_2.6
Clarity of solution: clear
Color of solution:BY7 max
Copper: 5ppm max
Heavy metals: 10ppm max
Lead: 2ppm max
Iron: 2ppm max
Oxalic aicd: 0.2%max
Sulphate ash(residue on ignition): 0.1%max
Specific optical rotation: +20.5~+21.5
Assay: 99.0%~100.5%
Organic volatile impurities: pass
Residual solvents: methanol NMT 3000ppm