C<sub>20</sub>H<sub>13</sub>N<sub>4</sub>S<sub>2</sub>O<sub>6</sub>Na&bullH<sub>2</sub>O CAS#: 69898-45-9 F.W.: 510.46 Reagent for the spectrophotometric determination of iron and copper. Approximately 7% water.
C<sub>20</sub>H<sub>13</sub>N<sub>4</sub>S<sub>2</sub>O<sub>6</sub>Na&bullH<sub>2</sub>O CAS#: 69898-45-9 F.W.: 510.46 Reagent for the spectrophotometric determination of iron and copper. Approximately 7% water.