Total Residual Free Chlorine (Cl) Back Catalog number: 54124 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-70S 1,2,3,6,7,8-Hexachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request 674661 Iopamidol, 100mg Price on request 1550.19-K-IO n-Nonadecane-d40, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 39756-36-0 Price on request