Internal Standard for AB SIM Back Catalog number: 94541 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3125.18-K-IOX5 Benzyl n-butyl phthalate-3,4,5,6-d7,1000 µg/mL,isooctane,1mL, Price on request 678335 Butylate, 10.0 µg/ml, Ethyl acetate, 10ml Price on request 50293 KCl, trans-Aconitic acid & Na Phosphate Mix Price on request