EPA Method 525 - PCB Standard Back Catalog number: 19063 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 54131 Conductance @ 20°C [1000 µmho/cm] Price on request Q147 Fluorescent Brightener Agent OB-2 [4,4''-Bis(5-methyl-2-benzoxazolyl)stilbene], 97%, 5g Price on request 681223 Formothion, 10.0 µg/ml, Ethyl acetate, 10ml Price on request