EPA Method 525 Spike C Back Catalog number: 92314 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680983 Metoprolol tartrate, 100 µg/ml, Methanol, 1ml Price on request 682584 Benzyl chloride, 1000mg Price on request 2501.13-10-T 1-Methyldibenzothiophene, 10µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 31317-07-4 Price on request