7625 CAS Dropper Pipet Sufficient for 50 tests at 20 ppm 1 drop = 1.25 ppm HEDP 1 drop = 1.4 ppm PBTC Chromazurol S method may be used for Dequest, Bayhibit, Belcor 575 and Belsperse 161 phosphonates. Indicator changes from yellow to pink at the pH ideal for the reaction, then…