Total Residual Free Chlorine (Cl) Back Catalog number: 59427 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70102 2,4’-DDT, 1000µg/ml in MeOH, 1ml Price on request 73152 Nonafluoro-1-butanesulfonate Price on request 53047 Calibration Standard Mix 5 Price on request