Multi-Element Internal Standard / Back Catalog number: 53319 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0723.12-K-IO 1,4-Dimethylnaphthalene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 571-58-4 Price on request 672987 17-beta-Estradiol-17-valerate, 100mg Price on request 73278 Octyl phenol ethoxylate Price on request