2-Methyl-1,3-butadiene

Hydroxy Atrazine-d5, 1mg

O-Desmethylvenlafaxine,100 µg/mL,MeOH,1mL,

Reagent kit for 100 tests (pH and free & total chlorine) Contains: 1 x 20 mL DPD1, 1 x 20 mL DPD2, 1 x 20mL DPD3, 1 x 20mL pH3