Total Residual Free Chlorine (Cl) Back Catalog number: 54224 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673619 gamma-HCH, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 19097 EPA Method 602 - Surrogate Standard Price on request 79253 2-Butanone Price on request