品名 | 規(guī)格 | 包裝 | 單價(jià) | 貨期 |
甲基-β-環(huán)糊精 | 98% | 25g | 506元 | 咨詢客服 |
甲基-β-環(huán)糊精 | 98% | 100g | 1408元 | 咨詢客服 |
甲基-β-環(huán)糊精 | average Mn 1310 | 100g | 1518元 | 咨詢客服 |
甲基-β-環(huán)糊精 | average Mn 1310 | 25g | 616元 | 咨詢客服 |
甲基-β-環(huán)糊精 | average Mn 1310 | 5g | 250.8元 | 咨詢客服 |
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%
外觀Appearance 白色粉末
紅外光譜鑒別Infrared spectrometry 和對(duì)照品匹配
純度Purity ≥98% (GC)
比旋光度Specific rotation [a]20/D +160.0 ~ +167.0°(C=1.5, H2O)
干燥損失loss on drying ≤5%
取代度Degree of substitution (NMR) 1.7 ~ 1.9
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