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貨號(hào) | 品名 | 規(guī)格 | 包裝 | 單價(jià) | 貨期 | 庫(kù)存 |
JD1227144569 | 1,2,3,5-四-氧-乙?;?D-呋喃核糖 | 98% | 25g | 48元 | 現(xiàn)貨 | 1 |
JD1227144568 | 1,2,3,5-四-氧-乙酰基-D-呋喃核糖 | 98% | 5g | 28元 | 現(xiàn)貨 | 1 |
性狀: | 熔點(diǎn):82 °C [α]20D : -14.5 ° (C=5, MeOH) |
質(zhì)量標(biāo)準(zhǔn): | 外觀Appearance White to off-white powder 紅外光譜鑒別Infrared spectrometry Conforms 純度Purity ≥98.0% (Titrimetry) 熔點(diǎn)Melting point 82°C - 85°C 比旋光度Specific rotation [a]20/D +13.0°~ +16.0°(c=6, MeOH) 干燥損失Loss on drying <1 % (60°C, 2 hrs) (vacuum) 重金屬Heavy metals (as Pb) <20 ppm 灼燒殘?jiān)黂es. after ignition <0.1 % |
貯存: | 用途 核苷(nucleoside) 合成的起始物質(zhì) |