2,2'-O-Cyclouridine:
Purity (HPLC) ≥99.0%
Assay (UV )： 98.0%
Melting point 245℃～250℃
(abs. max. 249nm,ε=8,ε=150±2%, PH7)：
A250/A260 1.30～1.40
A280/A260 0.08～0.10
Specific rotation [a]20/D +50 ～ +54 °(C=1, W/V in NaOH)
Loss on drying ≤0.5%
Residue On Ignition ≤0.1%
Heavy Metals(as pb)： ≤10ppm
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