EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C12637690 Diisopropylnaphthalene (mixture of isomers), certified, 0.1g Price on request 79270 3-Phenyltoluene Price on request 72428 cis-2-Butene Price on request