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Cyproheptadin hydrochlorid - CYPROHEPTADIN HYDROCLORID...

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CYPROHEPTADIN HYDROCLORID Cyproheptadini hydrocloridum C 21 H 21 N.HCl.3/2H 2 O P.t.l: 350,9 Cyproheptadin hydroclorid là 4-(5 H -dibenzo[ a,d ]cyclohepten-5-yliden)-1-methylpiperidin hydroclorid, ph i ch a t 98,5 đ n 101,0% C ế 21 H 21 N.HCl, tính theo ch ph m khan. ế Tính ch t B t k t tinh tr ng ho c ế vàng nh t, ít tan trong n c, d tan trong methanol, ít tan trong ethanol 96%. ướ Đ nh tính Có th ch n m t trong hai nhóm đ nh tính sau: Nhóm I: B, D Nhóm II: A, C, D A.Hòa tan 50,0 mg ch ph m trong ế ethanol 96% (TT) và pha loãng thành 50,0 ml v i cùng dung môi. Pha loãng 2,0 ml dung d ch này thành 100,0 ml b ng ethanol 96% (TT) . Ghi ph h p th (Ph l c 4.1) ụ ụ c a dung d ch này trong kho ng b c sóng t 230 nm đ n 320 nm. Dung d ch có c c đ i h p th ướ ế ụ ở b c sóng 286 nm. A( ướ 1%,1cm ) 286 nm t 335 đ n 365, tính theo ch ph m khan. ế ế B. Ph h ng ngo i (Ph l c 4.2) c a ch ph m đo trong ụ ụ ế parafin l ng (TT) ph i phù h p v i ph h ng ngo i c a cyproheptadin hydroclorid chu n (ĐC) v i cách chu n b t ng t . ị ươ C.Ph ng pháp s c ký l p m ng (Ph l c 5.4) ươ ụ ụ B n m ng: Silica gel GF 254 (TT).
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