| Inspection Item | Standard | Results |
| Appearance | White crystalline powder | White crystalline powder |
| Identification | Positive | Positive |
| Clarity of solution | Clear | Clear |
| Color of solution | ≤BY7 | <BY7 |
| Assay | 99.0~100.5% | 99.6% |
| Loss on Drying | ≤0.4% | 0.04% |
| *Residue on ignition | £0.1% | 0.04% |
| Specific rotation | +20.5°~ +21.5° | +20.95° |
| PH(with 2% water solution) | 2.4-2.8 | 2.64 |
| PH(with 5% water solution) | 2.1-2.6 | 2.32 |
| Melting range | About 190℃ | 191℃ |
| Heavy metals | ≤3ppm | <3ppm |
| *Iron | ≤2ppm | <2pp |
| *Copper | ≤2ppm | <2ppm |
| *Impurity E | ≤0.2% | <0.2% |
| *Arsenic | ≤1ppm | <1ppm |
| *Lead | ≤2ppm | <2ppm |
| *Cadmium | ≤1ppm | <1ppm |
| *Mercury | ≤1ppm | <1ppm |
| *Organic volatile impurities (As Methanol) | ≤3000ppm | <3000ppm |
| *Total Plate Count | ≤1,000cfu/g | <1,000cfu/g |
| *Yeast & Moulds | ≤500cfu/g | <500cfu/g |
| *Coliforms | Absent in 1g | Absent in 1g |
| *E. Coli | Absent in 1g | Absent in 1g |
| *Salmonella | Absent in 25g | Absent in 25g |
| *Staph Aureus | Absent in 25g | Absent in 25g |
| According to BP2016, E300, USP39, FCC 10, EP 8. | ||
(1) Vitamin C/VC is used as nutritional element in feed additives.
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