

| Item | JP18 standard | USP-NF2023 standard |
| CAS no. | 107-35-7 | |
| Packing | 25kg/cardboard carton, LDPE bag inside | |
| Shelf life | 3 years | |
| Storage condition | Store in well-closed containers | |
| Description | Colorless or white crystals, or a white crystalline powder. Soluble in water, practically insoluble in ethanol (99.5%) | |
| Identification | Positive | A. Positive B. Positive |
| Clarity and color of solution | Clear and colorless | |
| Assay | 99.0% ~ 101.0% | 98.0% ~ 102.0% |
| Loss on drying | ≤ 0.2% | ≤ 0.3% |
| Residue on Ignition | ≤ 0.1% | ≤ 0.3% |
| pH value | 4.1 ~ 5.6 | |
| Chloride | ≤ 0.011% | ≤ 0.05% |
| Sulfate | ≤ 0.010% | ≤ 0.03% |
| Ammonium | ≤ 0.02% | |
| Iron | ≤ 10 ppm | ≤ 30 ppm |
| Heavy metals | ≤ 10 ppm | |
| Related substances | ≤ 0.2% | |
| Related compounds | ≤ 0.5% | |
| Residual solvents | Negative | Negative |
| Readily carbonizable substance | Pass the test | Pass the test |
| Heavy Metal | ||
| Lead | ≤ 1.5 ppm | |
| Cadmium | ≤ 0.1 ppm | |
| Mercury | ≤ 0.1 ppm | |
| Arsenic | ≤ 1.0 ppm | |
| Microbiological Limits | ||
| Total Plate Count | ≤ 1000 cfu/g | |
| Yeast | ≤ 100 cfu/g | |
| Mold | ≤ 100 cfu/g | |
| E.coli | Negative/10g | |
| Salmonella | Negative/100g | |
| Staphylococcus aureus | Negative/10g | |
| Enterobacteriaceae | Negative/10g | |
| B. cereus | Negative/10g | |
| Sulphite red clostridia | Negative/10g | |
| Cronobacter | Negative/10g | |




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