EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 19494 EPA Method 524 & 624 - Internal Standard Price on request 2673.7-5MG Pentabromotoluene, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 87-83-2 Price on request 93845 EPA 525 Spike Mix Price on request