All three components come in powder form and will be mixed into two aqueous solutions each being 500 mL in volume. For more information on how to properly mix these reagents, reference the 3017M Reagent Preparation Document.
Reagent Shelf Life:
Free Chlorine Indicator = 5 years*
Free Chlorine Buffer = 5 years*
DPD Powder = 1 year*
*if kept in powdered form in a cool, dark, and dry location