Total Residual Free Chlorine (Cl) Back Catalog number: 54124 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L19000001ME Phenol-Mix 1, 50µg/ml in MeOH, 10ml Price on request 0008.10-100-T 2-Nitronaphthalene, 100µg/ml in Toluene, 1ml Price on request 682835 3-Hydroxynaphthalene-2,7-disulfonic acid disodium Price on request