EPA Method 500 Series Internal Standard Back Catalog number: 31004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79144 bis(2-Ethylhexyl) phthalate, 1000µg/ml in Acetone, 1ml Price on request 8914.14-100-T 6-Methyl-2',3,4,4'-tetrachlorodiphenylmethane Price on request 51039 MA - EPH Fractionation Surrogate Spike Price on request