Internal Standard Back Catalog number: 93185 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A578490 Amikacin, 500mg Price on request 2518.7-500MG Theophylline, neat, Solvent-neat, Unit 500mg, # of units-1, Cas.no. 58-55-9 Price on request 11268.22-100-AN Methoxyfenozide-d9 (3,5-dimethylbenzoyl-d9),100 µg/mL,acetonitrile,1mL, Price on request