EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8461.12-100 Phoxim, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 14816-18-3 Price on request 93864 D-(+)-Mannose Price on request 55202 Sodium Chloride for 55201 and 55203 Price on request