• 中文名称：吐温-40
• 英文名称：Ascorbic acid 2-glucoside
• CAS No.：9005-66-7
• 分子式：C12H18O11同分异构体
• 分子量：338.26472
• EINECS号：618-421-9
• 类别：乳化剂 生化与分子生物试剂 无机络合物 化妆品原料

密度：1.083?g/mL?at 25?°C(lit.)

熔点：0.1 °C

沸点：797.89°C (rough estimate)

折射率：n20/D 1.47(lit.)

闪光点：>230?°F

PSA：133.14000

logP：3.55880

溶解度：100 g/L

外观：淡 黄色蜡质 糊

存储：常温密闭避光，通风干燥处

化学性质：Yellow to amber liquid

气味：Characteristic odor

物理属性：本品为琥珀色油状液体，相对密度1.05～1.10，折射率1.470，粘度0.4～0.6 Pa·s （25℃），HLB值15.6。溶于水、稀酸、稀碱和多数有机溶剂，不溶于植物油和矿物油。

溶解性：Fully miscible with water. Soluble in isopropyl alcohol (100 mg/ml), and xylene. Insoluble in propylene glycol, and mineral oil.稳定性：Polysorbates are stable to electrolytes and weak acids and bases; gradual saponification occurs with strong acids and bases. The oleic esters are sensitive to oxidation. Polysorbates are hygroscopic and should be examined for water content prior to use and dried if necessary. Also, in common with other polyoxyethylene surfactants, prolonged storage can lead to the formation of peroxides.存储温度：Store at RT.