Melting point 182℃～190℃
(abs. max. 267nm,ε=9,780±2%, PH7)：
A250/A260 0.6～0.68
A280/A260 0.67～0.75
Specific rotation [a]20/D -18.4 ～ -18.2 °(C=2, W/V in 0.2N NaOH)
Loss on drying ≤0.5%
Residue On Ignition ≤0.3%
Heavy Metals(as pb)： ≤10ppm
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