Page Views: 210 Date Added: 09/14/2010 Last Updated: 09/14/2010 Expiry Date: 09/09/2029 Product/Service Details 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 ºC,the Alpha is 20.5 º (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 ≤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

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Company Profile: Based on the same business idea, i.e. to offer the maximum support to customers, several plants and companies amalgamated into Chemland Group Inc. in Qingdao 2008 with the expectation to integrate different resources. We have been striving to satisfy the customer needs at maximum from the beginning through the synergy of comprehending to the market, the improvement to the production, the close relationship with other manufacturers and the value-added service. Correspondingly, besides competitive price, high product quality, excellent package and timely shipment, we can also guarantee the quick responsiveness to the request, the efficiency to sourcing the uncommon chemicals and the technical support. Actually you can totally consider us as the one-stop procurement solution.. >> More Website URL: http://www.bridgat.com/u21672