Custom Calibration Standard Back Catalog number: 50254 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674678 D4-Acetylsalicylic acid, 50mg Price on request 8837.9-K-IO 2-Butyl-3-methylpyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request 674959 Profenofos, 100 µg/ml, Cyclohexane, 5ml Price on request