EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended BDE-138 2,2',3,4,4',5'-Hexabromodiphenyl ether, 1.2ml x 50ug/ml, nonane Price on request 79320 Endosulfan II Price on request 1693.16-500-IO 1,7-Dimethylphenanthrene, 500 µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 483-87-4 Price on request