EPA Method 8240A Internal Standard Back Catalog number: 22003 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3433.11-100 MCPB, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 94-81-5 Price on request 95453 PCB Congeners & Hexachlorobenzene Mix #4 Price on request 2530.11-100MG 2-Methoxynaphthalene, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 93-04-9 Price on request