Internal Standard Stock Solution, 1.2ml, nonane Back Catalog number: EPA-23ISS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 1579.4-K-ME Metformin hydrochloride, 1000µg base/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1115-70-4 Price on request 688359 Acid Mix, 100µg/ml in Water, 1ml Price on request 96693 524.3 Volatiles - UCMR3 Price on request