EPA 1620 Standard 1 Back Catalog number: 52139 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679109 4,4'-DDT, 10.0 µg/ml, Cyclohexane, 10ml Price on request 18000-0495-100AN5 Gabapentin, 100µg/ml in Acetonitrile, 5ml Price on request 2545.14-100-ME (±)-Atenolol,100 µg/mL,MeOH,1mL, Price on request