EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57240 Zirconium (Zr) Price on request M4H187 2,2',3,4',5,5',6-Heptachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene Price on request 0744.12-K-IO 2-Ethyltetraline, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 32367-54-7 Price on request