Customization: | Available |
---|---|
CAS No.: | 50-81-7 |
Formula: | C6h7nao6 |
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Characters
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White or almost white,crystalline powder or colourless crystals
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Identification
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Corresponds
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Melting point
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189ºC~193ºC
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PH (5%,W/V)
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2.1~2.6
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PH (2%,W/V)
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2.4~2.8
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Specific optical rotation
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+20.5°~+21.5°
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Appearance of solution
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Solution S is clear and not more intensely coloured than reference solution BY7
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Heavy metals
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<=10 ppm
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Assay
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99.0%~100.5%
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Copper
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<= 5ppm
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Iron
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<= 2ppm
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Mercury
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<= 1ppm
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Arsenic
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<=3ppm
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Lead
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<=2ppm
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Oxalic acid (impurity E)
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<=0.2%
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Loss on drying
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<=0.4%
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Sulphated ash
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<=0.1%
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Impurity C
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<=0.15%
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Impurity D
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<=0.15%
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Unspecified impurities
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<=0.10%
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Total
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<=0.2%
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Methanol
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<=3000ppm
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TAMC
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103 cfu/g
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TYMC
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102 cfu/g
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E.coli
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Absence
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