Specification :

Ascorbic Acid USP/BP Standard(Vitamin C)

CAS No.: 50-81-7
Molecular Formula: C6H8O6 Molecular Weight: 176.13

Property:
The melting point of Ascorbic acid(Vitamin C) is 190-192 ºC,the Alpha is 20.5 ?(c=10,H2O),the water solubility is 333 g/L (20 ºC).
Ascorbic acid(Vitamin C) behaves as a vinylogous carboxylic acid where the electrons in the double bond ("vinyl"), hydroxyl group lone pair, and the carbonyl double bond form a conjugated system. Because the two major resonance structures stabilize the deprotonated conjugate base of ascorbic acid(Vitamin C), the hydroxyl group in ascorbic acid(Vitamin C) is much more acidic than typical hydroxyl groups. In other words, ascorbic acid(Vitamin C) can be considered an enol where the deprotonated form is an enolate, which is usually strongly basic.

Specification:
Item Index
Characteristics White Crystalline Powder
Identification Positive Reaction
Melting Point About 190degree Celsius
PH 2.1-2.6
Clarity Of Solution Clear
Mercury ¡Ü0.1ppm
Zinc ¡Ü25ppm
Arsenic ¡Ü3ppm
Lead ¡Ü2ppm
Loss On Drying ¡Ü0.1%
Colour Of Solution ¡ÜBY7
Copper ¡Ü5ppm
Heavy Metals ¡Ü10ppm
Iron ¡Ü2ppm
Oxalic Acid ¡Ü0.2 %
Sulphate Ash
(Residue On Ignition) ¡Ü0.1%
Specific Optical Rotation +20.5¡ã- +21.5¡ã
Assay 99.0-100.5%
Organic Volatile Impurities Pass

Usage:
Ascorbic acid(Vitamin C) takes part in a variety of metabolic processes in human body and helps in inducing the fragility of capillary vessel, and improving the resistibility to illness.

Packing and Storage:Ascorbic acid(Vitamin C) is packed in 25KG net weight carton lined with PE bags(marks can be designed by customers) . Gross Weight 26.5kg/carton.Store in cool, dry and well closed place. Ascorbic acid(Vitamin C) is 2 years in original packages under the described conditions.

Key Words: Ascorbic acid; Vitamin C; L-Threo-2,3,4,5,6-pentahydroxy-1-hexenoic acid-4-lactone