甲基-β-环糊精,128446-36-6,Methyl-β-cyclodextrin Average mol. wt: ~ 1310 外观Appearance 白色粉末 红外光谱鉴别Infrared spectrometry Conforms 核磁Proton NMR spectra Conforms 熔点Melting point 160°C - 190°C 水溶解试验solubility in water 合格,> 200 g in 100 ml at 25°C 比旋光度Specific rotation [a]20/D + 164 +/- 3°(C=5%, H2O) 取代度Degree of substitution (per anhydro glucose unit): 1.7 – 1.9 Optical density of a 10% solution: 0.1 max. (350-600 nm); 1.0 max. (220-350 nm) 甲基-β-环糊精,128446-36-6,Methyl-β-cyclodextrin 还原物质Reducing compounds <0.5 %(determined as dextrose) β-环糊精β-Cyclodextrin: ≤0.1% 残留溶剂Residual solvents Methanol < 0.005% 甲基氯methyl chloride < 1 ppm 氯Chloride: ≤500 ppm 重金属Heavy metals: ≤10 ppm 干燥损失Loss on drying: ≤5.0 % 灼烧残渣Residue on ignition (sulphated ash):≤0.1% |