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stabilized with 7-8 % methanol
The acylation reagent HFBA as anhydride creates corresponding acids as by-products
116355-84-1
17α(H)-22
H2SO4 and HNO3
EC HPLC guard column (analytical), NUCLEOSIL 100-3 NH2, 3 µm, 4x3 mm 548-0867 stabilized with 7-8 % methanolFor protection of your main HPLC column from contamination, it is recommended to use guard columns. These short columns are placed into a guard column holder. The guard column holder in combination with a guard column inside is installed between the injector and the HPLC column. This installation prevents chemical impurities to reach the main column. Because a contamination could form an irreversible bond with the column packing material (stationary
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