PCB Congeners Back Catalog number: 94810 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2514.7-100MG 4-Hydroxybenzoic acid, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 99-96-7 Price on request 31531 p-Xylene Price on request 3751.6-100MG 1,2,3,5-Tetrachlorobenzene, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 634-90-2 Price on request