甲基-β-环糊精|128446-36-6||艾科试剂

货号	品名	产品规格	包装	单价(RMB)	促销价(RMB)	可用库存	备注
119761	甲基-β-环糊精	average Mn 1310	500g	5100.00	4845	>10	Q-D
119760	甲基-β-环糊精	average Mn 1310	100g	1100.00	1045	>10	Q-D
119759	甲基-β-环糊精	average Mn 1310	25g	510.00	484.5	>10	Q-D
119758	甲基-β-环糊精	average Mn 1310	5g	190.00	180.5	>10	Q-D

性状

溶于甲醇、丙酮、吡啶和二甲基亚砜
Bulk density ~ 0.2 – 0.3 g/ml
Melting range: 160 – 190 °C (decomp)

质量标准

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)
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%