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20881-04-3,双丙酮木糖, Diacetone-D-xylose, CAS:20881-04-3 C11H18O5 / 230.26 MFCD000632241,2:3,5-Di-O-isopropylidene-a-D-xylofuranose CAS No: 20881-04-3 Synonyms: Diacetone-D-xylose MDL No: MFCD00063224 Chemical Formula: C11H18O5 Molecular Weight: 230.26 Product Structure COA: Product name: 1,2:3,5-Di-O-isopropylidene-alpha-D-xylofuranose; Diacetone-D-xylose CAS: 20881-04-3              M.F.: C11H18O5              M.W.: 230.26 Batch No: 20120208           Quantity:836g Items Standards Results Appearance White crystalline power Positive Solubility Soluble in CHCl3 and insoluble in water Complies NMR and ESI-MS Should comply Complies Identification IR and TLC Positive Melting point 40℃ ~45℃ 43℃ ~45℃ Optical Activity [α]20/D (c=3 inAcetone) 18 o ~ 20o 19.4° Loss Weight On Dryness Max. 0.5% Complies Residue on ignition Max. 0.5% 0.05% Heavy metal Max. 20ppm Complies TLC (15%H2SO4-C2H5OH) One spot Complies Assay Min. 98% 99.2% References: 1. Lin TY, Chang HC, Lagow RJ, J. Org. Chem. 1999, Oct 29, 64(22), 8127-8129