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Ascorbic Acid Usp / Bp Standard Vitamin C

Posted at: Offers to Sell and Export | Posted on: Wed 13 Oct, 2010 5:38 am |
 
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Products Photos CatalogAscorbic Acid Usp Photos Catalog




Ascorbic Acid USP/BP Standard(Vitamin C)

CAS No.: 50-81-7



Molecular Formula: C6H8O6

Molecular Weight: 176.13

Structural Formula:

Property:

The melting point of Ascorbic acid(Vitamin C) is 190-192 C, the Alpha is 20.5 (c=10, H2O), the water solubility is 333 g/L (20 C).

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 ≤0.1ppm

Zinc ≤25ppm

Arsenic ≤3ppm

Lead ≤2ppm

Loss On Drying ≤0.1%

Colour Of Solution ≤BY7

Copper ≤5ppm

Heavy Metals ≤10ppm

Iron ≤2ppm

Oxalic Acid ≤0.2 %

Sulphate Ash

(Residue On Ignition) ≤0.1%

Specific Optical Rotation +20.5- +21.5

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



Company Contact:

No member photo
Contact Name: Lisa Shan
Company Name: Chemland Group Inc.
Email: Email
Tel: 86-532-85027689
Fax: 86-532-85028486
Street Address: No.10 Hongkong
Middle Rd, Qingdao, China
Website: http://www.chemland.us
Member name: lishshan
Country: China-CN China
Member Since: 13 October 2010
Total Leads: 15 lishshan Import Export Business Leads
Business focus: Food Additives, Feed Additives
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