EPA Method 8141/1657 Surrogate Standard

alpha alpha alpha (20R,23R,24R)-4 alpha,23,24-Trimethylcholestane, neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. 146276-37-1

Heptadecafluorooctanesulfonic acid, 1000µg/ml in MeOH, 1ml

Cyclohexanethiol, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 1569-69-3