WS Residual Free Chlorine Back Catalog number: 55023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8999.21-100-ME 17-Hydroxyprogesterone, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 68-96-2 Price on request 2315.9-100 Monolinuron, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 1746-81-2 Price on request 11780.10 1,2,3,5,7-Pentachloronaphthalene,,,, Price on request