EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MBP-162 2,3,3',4',5,5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane Price on request 9195.22-10MG Sildenafil-d3 (N-methyl-d3-piperazine), neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1126745-90-1 Price on request 15900-2671D-10CY5 alpha-HCH-d6, 10µg/ml in Cyclohexane, 5ml Price on request