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CAS号: 71138-97-1 英文名称: HYDROXYPROPYL METHYL CELLULOSE ACETATE SUCCINATE 英文同义词: HPMCAS;acetic acid, methanol;HyproMellose Acetate Succinate;Hypromellose Acetate Succinate (100 mg);HYDROXYPROPYL METHYL CELLULOSE ACETATE SUCCINATE;Hydroxypropyl Methyl cellulose acetate succinate JPE;acetic acid, methanol, propane-1,2-diol, succinic acid;HYDROXYPROPYL METHYL CELLULOSE ACETATE SUCCINATE,(HPMCAS);Cellulose,2-hydroxypropylmethylehter,acetatehydrogenbutanedioate 中文名称: 醋酸酯化丁二酸氢酯化的纤维素-2-羟基丙基甲基醚 中文同义词: 羟丙基甲基纤维素乙酸酯/琥珀酸酯;醋酸琥珀羟丙甲纤维素 USP标准品;醋酸酯化丁二酸氢酯化的纤维素-2-羟基丙基甲基醚 分子式: C10H22O9 分子量: 0 Mol file 溶解度 : Practically insoluble in ethanol (95%), hexane, unbuffered water, and xylene. On the addition of acetone, or a mixture of ethanol (95%) and dichloromethane (1 : 1), a clear or turbid viscous solution is produced. Hypromellose acetate succinate also forms a clear or turbid solution in buffers of pH greater than 4.5 with the rank order of solubility for the various grades increasing with the ratio of acetyl over succinoyl substitution. The exact pH value at which the polymer starts to swell and dissolve depends on the buffer type and ionic strength, although the rank order for the different grades is independent of the buffer used. No solvent has been found to completely dissolve hypromellose acetate succinate polymer; the resulting clear or turbid solutions significantly scatter light in both static and dynamic light scattering experiments, indicating that the polymer may exist as colloids or aggregates. The data is collated from the Shin-Etsu Chemical Co. Ltd and the research work of the authors (R Chen, BC Hancock, and RM Shanker). 海关编码 : 3912390000