Abstract
The KDP is grown for macroscale and is converted to nanoscale by milling, the lattice data are a=b= 7.4580Å and c= 6.9890Å. It is a tetragonal type of material. The nanoscale is confirmed by powdered XRD and is of 52 nano meter. The antibacterial assay generated for E.coli 0 µl(0), 50 µl( 16.8 ), 100 µl(20.5), P.aeruginosa 0 µl(0), 50 µl(20.2 ), 100 µl(25.1), V.parahaaemolytaus 0 µl(0), 50 µl(14.7 ), 100 µl(18.2), B.subeals 0 µl(0), 50 µl(22.7 ), 100 µl(24.4) in mm. Thus the antibacterial utility of KDP nano particle is identified. Keywords: KDP nano crystals, Tetragonal, Antibacterial, Milling.