EPA Method 515.1 Internal Standard Back Catalog number: 30023 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11691.12-100-IO 2,3,4',4'-Tetachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request 2095.20-K-IO Bis(2-n-butoxyethyl) phthalate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 117-83-9 Price on request 675346 Di-n-propyltin dichloride, 1000 µg/ml, Methanol, Price on request