Total Residual Free Chlorine (Cl) Back Catalog number: 54224 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50402 Nitrite as (NO2-) Price on request 3408.15-100 Fluazifop, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 69335-91-7 Price on request 685300 Clethodim-sulfoxide, 100 µg/ml, Acetonitrile, 1m Price on request