| ≥1 piece |
1.Product Name: Ascorbic acid, Vitamin C
2.CAS NO: 50-81-7
3.Purity: 99%-100.5%
4.Appearance: White or almost White Crystalline Powder
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Item
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Standard
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Appearance
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White crystalline powder
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Identification
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Positive
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Clarity of solution
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Clear
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Assay (%)
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99.0~100.5
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Loss on drying (%)
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≤ 0.40
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Residue on ignition (%)
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≤ 0.10
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Sulphate ash
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≤ 0.10
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Specific rotation
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from +20.5 to +21.5
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PH value (2% solution)
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2.4 ~ 2.8
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PH value (5% solution)
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2.1 ~ 2.6
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Heavy metals
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≤3 ppm
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Iron
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≤2 ppm
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Copper
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≤2 ppm
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Total plate count
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≤ 1000 cfu/g
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Arsenic
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≤1 ppm
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Mercury
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≤1 ppm
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Organic volatile impurities
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Meets the requirements
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Chloride (Cl) (%)
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≤ 0.30
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Melting point ( ℃)
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about 190
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Cadmium
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≤1 ppm
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Lead
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≤2 ppm
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