525 Internal Standard Back Catalog number: 96263 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72561 Diclofop acid Price on request S-4012-ASS-IO Pristane/n-Heptadecane Control Standard/Whole Oil Control Mixture 4 Pristane/n-Heptadecane = 1:2 (1000µg Pristane and 2000µg n-Heptadecane in 1mL isooctane) Price on request 19179 Toxaphene Price on request