EPA Method 525.2 - 526 Internal Standard Back Catalog number: 91297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-1234678-S 1,2,3,4,6,7,8-Heptachlorodibenzofuran , 1.2ml x 50ug/ml, nonane Price on request 1013.8-1ML Di-tert-butyldisulfide, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 110-06-5 Price on request 94745 o-Toluidine Price on request