EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 684721 Florpyrauxifen-benzyl, 10mg Price on request 2389.13-1G 4-Benzylphenol, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 101-53-1 Price on request 679412 13C6-Rafoxanide, 10mg Price on request