WA EPH Matrix Spike Mix Back Catalog number: 51145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681358 Phenylbutazone, 100mg Price on request 1076.15-K-IO n-Nonylbenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1081-77-2 Price on request 98527 N,N-Dimethylformamide Price on request