2,4-Dinitroaniline, 250mg

Propyl gallate, 250mg

1,7-Heptanedicarboxylic acid (Azelaic Acid), 250mg

Reagent kit for 45 tests (Free & total chlorine HR) Contains: 1 x 115 mL DPD0, 1 x 20mL DPD1, 1 x 20mL DPD3