EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73306 Methyl docosanoate Price on request 11692.12-100-IO 2,3,3',5-Tetrachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request 50591 Copper (Cu) - 2 PPM Price on request