EPA Method 551Mix “A” Back Catalog number: 30094 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1334.5-100MG 2-Methyltetrahydrothiophene, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 1795-09-1 Price on request 3427.15-100-CY Isofenphos Price on request 2170.20-5MG 1-/3-Nitrobenzo[e]pyrene, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 91259-16-4 / 81340-58-1 Price on request