【CAS】50-81-7
Alias: Ascorbic Acid；L-Ascorbate；Vitamin C
Molecular formula；C6H8O6
Structural formula:
1. Product Property
Vitamin C (L-Ascorbic Acid) is a white to light yellow crystalline powder, highly water-soluble with a characteristic acidic taste. It boasts ≥99.0% purity and decomposes at ~190°C. As a potent antioxidant, it neutralizes free radicals and supports collagen synthesis. Essential for immune function and iron absorption, it’s widely used in supplements, fortified foods (0.01%-0.1%), and cosmetics (5%-20%). Store sealed in cool (<25°C), dark, dry conditions to prevent oxidation.
2.
| Parameter | Requirement |
| Appearance | White to light yellow crystals/powder |
| Assay (C₆H₈O₆) | ≥ 99.0% |
| Specific Rotation | +20.5° to +21.5° (20°C, water) |
| Residue on Ignition | ≤ 0.1% |
| Heavy Metals (as Pb) | ≤ 10 mg/kg |
| Arsenic (As) | ≤ 3 mg/kg |
| Oxalate | ≤ 0.3% (test by turbidity comparison) |
3、Application scope and Usage
Vitamin C is widely used in pharmaceuticals, dietary supplements, and food fortification due to its antioxidant properties. It treats scurvy, boosts immunity, and enhances iron absorption. In cosmetics, it brightens skin and reduces oxidative stress. The food industry employs it as a preservative (E300) to prevent oxidation. Recommended daily intake varies (75–90 mg for adults), with higher doses used therapeutically. It is available in tablets, capsules, powders, and injectable forms. Overconsumption may cause gastrointestinal discomfort, so dosage should be monitored.
4. Package and Storage
Vitamin C is typically packaged in 25 kg fiber drums or aluminum foil bags to minimize moisture and oxidation. For small quantities, airtight HDPE bottles are used. Store in a cool, dry place (below 25°C) away from direct sunlight and humidity. Keep containers tightly sealed to prevent degradation. Avoid contact with metals and oxidizing agents. Under optimal conditions, shelf life is 24 months. Refrigeration extends stability but is not mandatory. For industrial use, nitrogen-flushed packaging may be applied to enhance preservation. Always check for discoloration or clumping before use.
