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item | unit | bp 2009 | usp 32 | fcc 6 | e 330 | gb1987-2007 |
characters | Â | white crystalline powders,colorless crystals or granules | ||||
identification | Â | pass test | ||||
color & clarity of solution | Â | pass test | pass test | / | pass test | / |
assay | % | 99.5-100.5 | 99.5-100.5 | |||
water | % | ≤1.0 | ≤1.0 | ≤0.5 | ≤0.2 | ≤0.5 |
light transmittance | % | / | / | / | / | ≥96.0 |
calcium | ppm | / | / | / | ≤75 | ≤200 |
iron | ppm | / | / | / | ≤5 | ≤5 |
arsenic | ppm | / | / | / | ≤1 | ≤1 |
mercury | ppm | / | / | / | ≤1 | / |
heavy metals | ppm |    ≤10 | ≤10 | / | ≤5 | / |
chloride | ppm | / | / | / | / | ≤50 |