甲基-β-環(huán)糊精的化學(xué)性質(zhì),質(zhì)量標(biāo)準(zhǔn)及用途

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

Average mol. wt: ~ 1310 

外觀Appearance                          白色粉末
紅外光譜鑒別Infrared spectrometry       Conforms
核磁Proton NMR spectra                  Conforms 
熔點(diǎn)Melting point                       160°C - 190°C 
水溶解試驗(yàn)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)
還原物質(zhì)Reducing compounds              <0.5 %(determined as dextrose)
β-環(huán)糊精β-Cyclodextrin:                 ≤0.1% 
殘留溶劑Residual solvents Methanol      < 0.005%
甲基氯methyl chloride                   < 1 ppm
氯Chloride:                             ≤500 ppm 
重金屬Heavy metals:                     ≤10 ppm 
干燥損失Loss on drying:                 ≤5.0 % 
灼燒殘?jiān)黂esidue on ignition (sulphated ash):≤0.1% 
 

增加非極性物質(zhì)的溶解性，如脂肪酸、脂類、維生素和膽固醇，用于細(xì)胞培養(yǎng)中。