This document discusses the preparation and use of 1% sodium hypochlorite (JIK) for decontamination purposes. It provides the formula for diluting a 5% stock solution of JIK to produce 500ml of a 1% solution. Surfaces like bench tops and equipment in laboratories are decontaminated each morning using 1% JIK or other disinfectants like Dettol soap to kill microbes. Proper personal protective equipment and disposal procedures are followed.