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| Quality Standards of Citric Acid Monohydrate |
Item | Unit | BP 2009 | USP 32 | FCC 6 | E 330 | GB1987-2007 |
Characters | White Crystalline Powders,Colorless Crystals or Granules | |||||
| Identification | Pass Test | |||||
| Color & Clarity of Solution | Pass Test | Pass Test | / | Pass Test | / | |
| Assay | % | 99.5-100.5 | 99.5-100.5 | |||
| Water | % | 7.5-9.0 | 7.5-9.0 | ≤8.8 | 7.5-8.8 | 7.5-9.0 |
| Light Transmittance | % | / | / | / | / | ≥95 |
| Calcium | ppm | / | / | / | ≤75 | ≤200 |
| Iron | ppm | / | / | / | ≤5 | ≤5 |
| Arsenic | ppm | / | / | / | ≤1 | ≤1 |
| Mercury | ppm | / | / | / | ≤1 | / |
| Heavy Metals | ppm | ≤10 | ≤10 | / | ≤5 | / |
| Oxalate | ppm | ≤360 | ≤360 | Pass Test | ≤100 | ≤100 |
| Chloride | ppm | / | / | / | / | ≤50 |
| Sulphate | ppm | ≤150 | ≤150 | / | ≤150 | ≤150 |
| Readily Carbonisable Substances | Not Darker than Standard | Not Darker than Standard | Pass Test | Pass Test | ≤1.0 | |
| Sulphated Ash | % | ≤0.1 | ≤0.1 | ≤0.05 | ≤0.05 | ≤0.05 |
| Volatile Organic Impurities | / | / | Pass Test | |||
| Tridodecylamine | mg/kg | / | / | ≤0.1 | ||
| Lead | ppm | / | / | ≤0.5 | ≤0.5 | ≤0.5 |
| Aluminum | ppm | ≤0.2 | ≤0.2 | / | / | / |
| Bacterial Endotoxins | IU/mg | <0.5 | Pass Test | / | / | / |
| Water Insoluble Substances | / | / | / | / | Filtration time not more than 1 min; Filter membrane basically doesn't change color; Visual mottled particles not more than 3. | |
citric acid monohydrate