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Isoascorbic Acid or Erythorbic Acid USP NF FCC Food Grade Supplier Exporter Manufacturers' Representative |
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Isoascorbic Acid or Erythorbic Acid
CAS Number: 89-65-6
Molecular Formula: C6H8O6
Molecular Weight: 176.13
Isoascorbic Acid or Erythorbic Acid
Erythorbic Acid USP NF Grade:
C6H8O6 -- 176.12
o-Araboascorbic acid;
d-Erythro-hex-2-enoic acid delta-lactone;
Isoascorbic acid, d-isoascorbic acid CAS Number 89-65-6
DEFINITION
Erythorbic Acid contains NLT 99.0% and NMT 100.5% of C6H8O6 , calculated on the dried basis.
IDENTIFICATION
A. Infrared Absorption
B. Sample solution: 20 mg/mL of Erythorbic Acid and water.
Analysis: To 2 mL of Sample solution add a few drops of sodium nitroferricyanide TS and then add 1 mL of 0.1 N sodium hydroxide.
Acceptance criteria: A transient blue color immediately appears.
C. Analysis: Dissolve about 15 mg of Erythorbic Acid in 15 mL of trichloroacetic acid (1:20). Add about 200 mg of activated charcoal and shake the mixture vigorously for 1 min. Pass through a small, fluted filter, refilter if necessary to obtain a clear filtrate, agitate the mixture until the pyrrole is dissolved, and heat in a water bath at 50°.
Acceptance criteria: A blue color appears.
Residue on Ignition: NMT 0.3%
Limit of Lead: NMT 10 ppm.
Optical Rotation, Specific Rotation: −16.5° to −18.0°
Loss on Drying: Dry a sample in a vacuum over silica gel for 3 h: it loses NMT 0.4% of its weight.
Erythorbic Acid FCC Food Grade:
D-Araboascorbic Acid
C6H8O6 Formula weight 176.13
INS: 315 CAS Number 89-65-6
DESCRIPTION
Erythorbic Acid occurs as white or slightly yellow crystals or powder. It gradually darkens when exposed to light. In the dry state, it is reasonably stable in air, but in solution, it rapidly deteriorates in the presence of air. It melts between 164C and 171C with decomposition. One gram is soluble in about 2.5 mL of water and in about 20 mL of alcohol. It is slightly soluble in glycerin.
Function: Preservative; antioxidant.
Identification:
A. Add a few drops of sodium nitroferricyanide to 2 mL of a 1:50 aqueous solution, then add 1 mL of approximately 0.1 N sodium hydroxide. A transient blue color immediately appears.
B. Dissolve about 15 mg of sample in 15 mL of a 1:20 trichloroacetic acid solution, add about 200 mg of activated charcoal, and shake the mixture vigorously for 1 min. Filter through a small, fluted filter, refiltering if necessary to obtain a clear filtrate. Add 1 drop of pyrrole to 5 mL of the clear filtrate, agitate the mixture until the pyrrole is dissolved, then heat in a water bath at 50C. A blue color appears.
Assay: Not less than 99.0% and not more than 100.5% of C6H8O6, calculated on the dried basis.
Lead: Not more than 2 mg/kg.
Loss on Drying: Not more than 0.4%.
Optical (Specific) Rotation [alpha]D25°: Between -16.5° and -18.0°.
Residue on Ignition: Not more than 0.3%.
Please visit SDS Safety Data Sheet of Erythorbic Acid Suppliers.
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