BTEX Mix

(2RS)-2-(4-Methylphenyl)propanoic acid, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 938-94-3

d2 C27 alpha alpha alpha (20R)-Cholestane, 10µg/mL in Isooctane, 1ml

Benzocaine,1000 µg/mL,acetonitrile,1mL,