Acids Calibration Level 5 Back Catalog number: 94842 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71049 2,6-Dimethylnaphthalene Price on request 31023 EPA Method 515.1 Internal Standard Price on request 9838.12-K-ME Furosemid, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 54-31-9 Price on request