Interference Standard 1 Back Catalog number: 53039 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73631 Loperamide, 1000µg/ml in MeOH, 1ml Price on request 8733.20-100MG n-Butyl n-octyl phthalate, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 84-78-6 Price on request 59462 Sulfate (SO42-) Price on request