VARIO Sulphate 4 F10, powder packs, packing unit = 100 Powder Packs The fast and easy use of powder reagents has made them extremely popular for water testing applications in many countries throughout the world. The powder reagents programme provides users with a real alternative to existing measurement systems. The powder reagents are produced to the same high quality standards that have made Tintometer's tablet reagents so successful for several decades. Parameters from aluminium and chlorine through to sulphate are just some of the well-known tests that are included in the powder reagents range.