Total Residual Free Chlorine (Cl) Back Catalog number: 54224 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673047 Hexadecyltrimethylammonium bromide, 250mg Price on request C633150 Cobicistat, 10mg Price on request 2980.7-100 Aldicarb sulfoxide, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 1646-87-3 Price on request