Interference Standard 3 Back Catalog number: 53050 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59427 Total Residual Free Chlorine (Cl) Price on request 91963 Phenols Mix #1 Price on request 0328.20-100-TX5 2,2'-Binaphthyl-d14, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 210487-05-1 Price on request