Spiking Solution Back Catalog number: 59381 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9721.27-100-IO Heptacosanoic acid, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 7138-40-1 Price on request R509502 Rifaximin-d6 (Major), 1mg Price on request 96622 Isopropanol (2-Propanol) Price on request