Interference Standard 4 Back Catalog number: 53041 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9973.10-10MG Propylhexedrine hydrochloride, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1007-33-6, free base101-40-6 (old: 3595-11-7) Price on request 2472.6-K-IP 2,6-Dibromophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 608-33-3 Price on request 73685 4-Hydroxy-2-butanone Price on request