Chemical name 2- Acetamino -9-Acetoxyethoxymethyl -6-Hydroxy Purine CAS NO. 75128-73-3 Formula: C12H15N5O5 M.W.: 309.28 Structure: Main Specifications: Description: Off-white to grey crystallization powder. Assay: min.98.0% Usage: For intermediate of antiviral API acyclovir. Package: 25 kg/drum,lined with plastic bag. Description: Off-white to grey crystallization powder Melting Range: min.196.0℃ Loss on drying: max.0.5% Related substances Guanine: ≤0.3% Monoacetylguanine: ≤0.8% Diacetylguanine ≤0.3% Unknown individual impurity ≤0.5%