EPA Method 8250/8250A Cal Check Cmpds Acids Back Catalog number: 82508 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended P-094S Chlorpyrifos, 100µg/mL in MeOH, 1ml Price on request 11319.13-K-ME Melatonin,1000 µg/mL,MeOH,1mL, Price on request 676141 Flubendiamide, 100 µg/ml, Acetonitrile, 5ml Price on request