Selenium (Se) Back Catalog number: 57234 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2513.9-K-ME Acetylsalicylic acid, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 50-78-2 Price on request 11-1810-4 10-Methyloctadecanoic acid, 5mg Price on request 31582 EPA Method 507 Nitrogen Phosphorus Pesticides Price on request