| Items | Standard | Test |
|---|---|---|
| Appearance | White crystalline powder | USP |
| Identification | Positive | USP |
| Clarity of solution | Clear | EP |
| Color of solution | ≤ BY7 | EP |
| Assay | 99.0~100.5% | USP |
| Loss on Drying | ≤ 0.4% | E300 |
| Residue on ignition | ≤ 0.1% | USP |
| Specific rotation | 20.5°~21.5° | USP |
| PH(with 2% water solution) | 2.4-2.8 | E300 |
| PH(with 5% water solution) | 2.1-2.6 | EP |
| Melting range | About 190°C | EP |
| Heavy metals | ≤ 3ppm | USP |
| Iron | ≤ 2ppm | EP |
| Copper | ≤ 2ppm | EP |
| Impurity E | ≤ 0.2% | EP |
| Arsenic | ≤ 1ppm | USP |
| Lead | ≤ 1ppm | FCC |
| Cadmium | ≤ 1ppm | |
| Mercury | ≤ 0.1ppm | E300 |
| Organic volatile impurities | Methanol ≤ 3000ppm | USP |
| Related Substances |
Impurity C ≤ 0.15% Impurity D ≤ 0.15% Any Other Unspecific Impurity ≤ 0.10% Total Impurity ≤ 0.2% |
EP |
| Total Plate Count | ≤ 1,000cfu/g | |
| According to BP2021/USP43/FCC12/EP10/E300 |
Product specifications
Our ascorbic acid stands out for its exceptional purity and versatility. Manufactured to meet the highest industry standards, it is tailored to serve the needs of diverse industries, including pharmaceuticals, food, and industrial applications. Below are the detailed specifications that ensure quality and compliance.