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Personne àcontacter Kelly
NO 1, HUANG XIAO BEI ROAD, Wuhan, Hubei
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Item
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Specification (EP5)
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Characters
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A
white, crystalline powder, practically insoluble in water, in
alcohol and in ether. It dissolves in dilute mineral acids and in
dilute solutions of alkali hydroxides.
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Identification
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A
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It
complies with the test for specific optical rotation
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B
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Examine by infrared absorption
spectrophotometry
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C
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Examine the chromatograms obtained in the test
for Ninhydrin-positive substances.
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D
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A dark
red colour is produced, which changes to brown and then to yellow
within a few minutes.
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Appearance of solution
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Solution is clear and colourless
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pH
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2.8 to 3.0
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Specific rotation [α]D*0
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**2.5 to **5.5°
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ninhydrin-positive substance
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Not more than 0.5%
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Chloride (Cl)
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Not more than 0.*5%
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Sulphates (SO4)
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Not more than **0 ppm
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Heavy
metals (Pb)
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Not more than *0ppm
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Loss
on drying
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Not more than 0.5%
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Sulphated ash
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Not more than 0.3%
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Assay
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*8.5 to **1.0 %
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