WS Disinfection By-Products - Cal Check 1 Back Catalog number: 92894 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 96722 VOC Standard Price on request 679433 Zilpaterol hydrochloride, 100 µg/ml, Water, 1ml Price on request 675307 Atrazine-desisopropyl, 100 µg/ml, Acetonitrile, Price on request