Ascorbic Acid

Ascorbic acid or Vitamin C, also known as and L-ascorbic acid, is a vitamin found in food and used as a dietary supplement. As a supplement it is used to treat and prevent scurvy. It is generally well tolerated. Large doses may cause gastrointestinal discomfort, headache, trouble sleeping, and flushing of the skin. Normal doses are safe during pregnancy. Vitamin C is an essential nutrient involved in the repair of tissue. Foods that contain vitamin C include citrus fruit, tomatoes, red peppers, and potatoes. It is also used as oxidation retarder in chemical analysis.

Specifications and a Typical Certificate of Analysis of Ascorbic Acid:

We also manufacture and supply Micro-Encapsulated Ascorbic Acid, having core of Ascorbic Acid and coating of vegetable oil or mono and diglycerides or as desired by the buyer.

Ascorbic Acid USP Grade Specifications:
C6H8O6 --- 176.12
l-Ascorbic acid --- CAS 50-81-7

DEFINITION
Ascorbic Acid contains NLT 99.0% and NMT 100.5% of C6H8O6

IDENTIFICATION
A. Infrared Absorption
B. A 20-mg/mL solution reduces alkaline cupric tartrate slowly at room temperature but more readily upon heating.

Residue on Ignition: 0.1% maximum.

Ascorbic Acid BP Ph Eur Grade Specifications:
C6H8O6 --- 176.1 CAS 50-81-7
Content: 99.0 per cent to 100.5 per cent.

CHARACTERS
Appearance: White or almost white, crystalline powder or colourless crystals, becoming discoloured on exposure to air and moisture.
Solubility: Freely soluble in water, sparingly soluble in ethanol (96 per cent).
Melting point: About 190C, with decomposition.
Iron: Maximum 2 ppm.
Sulfated ash: Maximum 0.1 per cent, determined on 1.0 g.
Meet impurities profile.

Ascorbic Acid FCC Food Grade Specifications:
Vitamin C; L-Ascorbic Acid
C6H8O6 --- Formula weight 176.13
INS: 300 --- CAS 50-81-7

DESCRIPTION
Ascorbic Acid occurs as white or slightly yellow crystals or as powder. It melts at about 190C. It gradually darkens on exposure to light, is reasonably stable in air when dry, but rapidly deteriorates in solution in the presence of air. One gram is soluble in about 3 mL of water and in about 30 mL of alcohol. It is insoluble in chloroform and in ether.
Function: Antioxidant; meat-curing aid; nutrient.

REQUIREMENTS
Identification:
A. A 1:50 aqueous solution slowly reduces alkaline cupric tartrate TS at 25C, but more readily upon heating.
B. The infrared absorption spectrum of a potassium bromide dispersion of the sample exhibits maxima at the same wavelengths as those of a similar preparation of USP Ascorbic Acid Reference Standard.
Assay: Not less than 99.0% and not more than 100.5% of C6H8O6.
Lead: Not more than 2 mg/kg.
Optical (Specific) Rotation [α]D25°: Between +20.5° and +21.5°.
Residue on Ignition: Not more than 0.1%.