vaselin - VASELIN Vaselinum album Vaselin l mt hn hp cc...

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VASELIN Vaselinum album Vaselin là m t h n h p các hydrocarbur l y t d u m , đã đ c tinh ch và t y màu. ượ ế Tính ch t Vaselin là m t ch t nh n quánh mà đ đ c loãng tuỳ thu c vào nhi t đ c a môi tr ng, ườ màu tr ng ngà, l p m ng thì trong su t h u nh không màu, có huỳnh quang nh d i ánh ư ướ sáng ban ngày khi tr ng thái tan ch y. Nó h u nh khan. ư Ch ph m tan ch y nhi t đ 36 đ n 60 ế ế ° C. tr ng thái tan ch y có th hoà tr n theo m i t l v i methylen clorid. ỷ ệ H u nh không tan trong n c và ethanol, tan trong cloroform, ether. Các dung d ch vaselin ư ướ có th đ c l . Đ nh tính A. Ph h ng ngo i (Ph l c 4.2) c a ch ph m, xác đ nh d i d ng màng m ng trên m t ụ ụ ế ướ phi n kính halogenid, ph i có các c c đ
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