| Ascorbic Acid Product Quality Indicators | ||||
| Analysis items | Specification | |||
| Food-grade | Pharmaceutical-grade | Feed-grade | Cosmetic-grade | |
| Content (calculated as C₆H₈O₆) | ≥99.0% (GB14754-2010) | 99.0~101.0% (USP/EP) | ≥97.0% (GB/T 7303-2018) | ≥98.0% (EFSA 2021) |
| Specific rotation [α]ᴅ²⁰ | +20.5°~+21.5° | +20.5°~+22.5° | +20.0°~+22.0° | +20.5°~+21.5° |
| pH value (2% solution) | 2.1~2.6 | 2.2~2.5 | 2.0~2.8 | 2.3~2.6 |
| Heavy metals (Pb) | ≤2 mg/kg | ≤1 mg/kg | ≤10 mg/kg | ≤5 mg/kg |
| Arsenic (As) | ≤1 mg/kg | ≤0.5 mg/kg | ≤3 mg/kg | ≤2 mg/kg |
| Ignition residue | ≤0.1% | ≤0.05% | ≤0.2% | ≤0.1% |
| Oxalate | ≤0.2% | ≤0.1% | ≤0.3% | ≤0.25% |
| Iron (Fe) | ≤2 mg/kg | ≤1 mg/kg | ≤15 mg/kg | ≤5 mg/kg |
| Microbial control | ||||
| Total number of colonies | ≤1000 CFU/g | ≤100 CFU/g | ≤5000 CFU/g | ≤500 CFU/g |
| Molds and yeasts | ≤100 CFU/g | ≤10 CFU/g | ≤200 CFU/g | ≤100 CFU/g |
| Special requirements | ||||
| Solubility | Fully soluble and clear | Aseptic and pyrogen-free | Coated and sustained release (≥70% sustained release rate) | Transdermal absorption rate ≥5% |
| Stability | Protect from light and moisture | Sealed with nitrogen filling (shelf life 3 years) | High temperature resistance (weight loss ≤5% at 80℃) | Formulation pH 3.0~3.8 |
Application Scope
1、Fresh-keeping of fruits and vegetables: Vitamin C removes reactive oxygen species, delays the aging process of fruits and vegetables, and improves the fresh-keeping effect.
2、Anti-browning: Inhibits enzymatic browning reactions and reduces quinone compounds to prevent discoloration.
3、Improvement of protein properties: Affects protein cross-linking and interaction through the oxidation-reduction system.
4、Inhibition of fat oxidation: Protects fats and oils from oxidation and extends the shelf life of foods.
5、Reduction of nitrite content: Reduces nitrite to decrease the formation of carcinogens.
6、SO₂ supplement: Replaces part of sulfur dioxide in wine to reduce residual risks.
7、Protection of tea polyphenol stability: Increases the content of theaflavins in black tea and reduces polymerization reactions.
8、Reagent and reference substance: Used for the determination of elements such as arsenic, iron, iodine, and as reducing agents and masking agents.
9、Chicken breeding: Promotes the growth of chicks, improves egg production rate and eggshell quality, and enhances immunity.
10、Aquaculture: Improves meat quality and swimming ability, enhances stress resistance and survival rate.
11、Indications: Treat scurvy, chronic iron poisoning, infectious diseases, and diseases requiring increased vitamin C intake.
12、Pharmaceutical preparations: Includes various dosage forms such as tablets, injections, and effervescent tablets.
【Label Description】
