EPA Method 525.1 Standard Back Catalog number: 94572 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 63121 PCB No. 121, 1000μg/ml in Isooctane, 1ml Price on request AE-00053 Pesticide Mix #23, 10µg/mL in Acetonitrile, 1ml Price on request 56081 Thallium (Tl) Price on request