EPA 1620 Standard 2 Back Catalog number: 53140 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 683877 D4-2,4,5-T, 100 µg/ml, Acetone, 1ml Price on request 8484.15-K-ME Metoprolol (free base), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 51384-51-1 Price on request 1019.12-K-IO n-Dodecane-d26, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 16416-30-1 Price on request