EPA Method 515.3 - Derivatized acids Back Catalog number: 30151 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-27S 1,2,3,4-Tetrachloronaphthalene, 1.2ml x 50ug/ml, nonane Price on request 96587 Pseudoephedrine Price on request 680236 trans-3-Hydroxycotinine, 100 µg/ml, Methanol, 1m Price on request