EPA Method 632 Spike Standard Back Catalog number: 93970 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3665.6-50-IO 1,2,4,5-Tetrabromobenzene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 636-28-2 Price on request 0977.27-25MG d2 C27 ??? (20R)-Cholestane,neat,neat,25mg Price on request 3186.17-K-IO Ethyl pentadecanoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 41114-00-5 Price on request