EPA Method 1666Labeled Standard Back Catalog number: 82493 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59462 Sulfate (SO42-) Price on request 58128 Nickel (Ni) Price on request C20600000 Benzo[b]naphtho[2,1-d]thiophene, 10mg Price on request