Reagent tablet PHENOLRED for pH value in blister packaging packing unit = 100 tablets (packing unit 250 and 500 tablets on request) The suitable tablet for the fast result Water analysis couldn’t be easier. Precise dosing, long shelf life and easy handling make the tablet reagent the most popular indicator system and the cheapest way to have analyse a parameter. The tablet reagent in the aluminium blister pack withstands almost all climatic conditions and external influences. In addition, there is no safety risk for the user.