Product Code Pack Size Sterling Euros Dollars      50045  250mg  £65  €99  $133   3´,4´-Dihydroxyflavone-4´-β-D-galactopyranoside sodium salt DHF-Gal sodium salt; 3´,4´-Dihydroxyflavone-4´-beta-D-galactopyranoside sodium salt  CAS: 517892-05-6 MF: C21H19NaO9 MW: 438.40 Substrate producing highly visible, localised, black or dark brown colonies when used in conjunction with an iron salt. This dark colour is able to mask the colour formed by indoxyl substrates such as X-Gal (70045) when incorporated into the same medium. Can also be used to produce discrete yellow colonies in the presence of aluminium salts.     Protected by Glycosynth patents: European Patent  1438423 and US Patent 7,531,646.   For use only in internal research conducted by the purchaser. No rights under the aforementioned patents are conveyed which permit the resale, transfer, or use for purposes other than research. Rights under the aforementioned patents, for purposes other than internal research, may be obtained by contacting Glycosynth Ltd.