Mixed Calibration Standard 2 Back Catalog number: 52054 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72116 Butyl paraben Price on request 2532.13-100-ME (2RS)-2-(4-Butylphenyl)propanoic acid, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 3585-49-7 Price on request C633150 Cobicistat, 10mg Price on request