Internal Standard Solution, 1.2ml, toluene Back Catalog number: EPA-8280IS Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 0456.17-200-IO 1,2,4-Trimethylphenanthrene, 200µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 23189-64-2 Price on request 11758.12-100-IO 2,2',3,3',4,5',6-Heptachlorobiphenyl,100 µg/mL,isooctane,1mL, Price on request S-4368-200-5DC EPA 528 rev. 1.0 Internal Standard Solution 2 200µg/mL in dichloromethane; unit: 1x5mL 2081.6 2,3,4,5-Tetrachlorophenol [4901-51-3] Price on request