Chlor X is an antibacterial irrigation and cleansing agent for root canal prior to filling with resin material. It is effective against certain NaOcl resistant bacterial strains. Advantages : Highly biocompatible to oral tissues Possess optimal antibacterial properties against gram positive and gram negative bacteria Known for its pleasant odour and taste Largely accepted in uncooperative pediatric patients Non irritating, well tolerated by periapical tissues INDICATIONS :- It is widely indicated as final irrigant during chemomechanical preparation. It is choice of irrigant while performing retreatment root canal procedures. It is indicated as an irrigant in apical 3rd of root before retrograde filling during apicoectomy (root end surgery). It is a potent irrigant while treating internal/external resorption cases. It is widely used before sealing (coronal/radicular) perforation in the tooth.