WS Disinfection By-Products - Cal Check 4 Back Catalog number: 93986 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73603 Chlorotetracycline Price on request 71641 Propyl sulfide Price on request 3644.3-500-10PY Glycerol, Stock solution, 500µg/mL, Solvent-dry pyridine, Unit 10mL, # of units-1, Cas.no. 56-81-5 Price on request