EPA Method 507/525 Analytes Mix #4 Back Catalog number: 30085 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11903.6-K-ME Metronidazole,1000 µg/mL,MeOH,1mL, Price on request 1267.8-K-ME o-Xylene, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 95-47-6 Price on request 673961 Cinmethylin, 50mg Price on request