2,3,3',4,4',5'-Hexachlorobiphenyl, 5mg Back Catalog number: C-157N Availability: In the manufacturer's stock Price on request - + Recommended 95107 Triethyleneglycol monoethyl ether Price on request 72011 2,4-Dimethylphenol-d3 Price on request 92258 Semi-Volatile Internal Standard Price on request