Ascorbic Acid (Vitamin C)

 

Molecular formula: C6H8O6 Weight: 176.14
Physicochemical Properties: This product is white crystals or crystalline powder, melting point 190 °C to 192 °C; odorless, Meisuan; long home color gradually Wei Huang. The materials in the water soluble, slightly dissolved in ethanol, ethyl ether or chloroform in insoluble. The goods 5% (W / V) solution pH 2.1 to 2.6, the goods 10% (W / V) solution Specific rotation is +20.5 ~ +21.5.
Quality Standards: Chinese Pharmacopoeia 2000 Version 2
item                        Test results                      Chinese pharmacopoeia 2000 Version
Characteristic                 pass                            white crystalline powder
Melting point                  191.0                                    190-192
Specific rotation            +20.5--+21.5                                 +21.0
Identificatior                 pass                                      pass
Clarity&Colour of solution    pass                                       A≤0.03
Residue on ignition           0.02%                                      ≤0.1%
Ferrite                       <2ppm                                      ≤2ppm
Copper                        <5ppm                                      ≤5ppm
Heavy metals                  <3ppm                                      ≤10ppm