<prompt> Citric acid concentration in MTAD is:4.253.7510.50  <response>: CompositionTetracycline: It is bacteriostatic, broad spectrum antibiotic. It has low pH and acts as calcium chelator. It removes smear layer. It has property of substantivity. It promotes healing.Citric acid 4.25: It is bactericidal in nature and removes smear layer.Detergent Tween 80: It decreases surface tension. 