2,3,5,6-Tetrabromo-p-xylene, 1.2ml x 50ug/ml , toluene Back Catalog number: PTBX Manufacturer: Wellington Laboratories Availability: 1 week Price on request - + Recommended 11009 CLP Semi-Volatile Internal Standard Price on request 94422 EPA Method 8270 Additionals Price on request DF-LCS-C40 Mass-Labelled PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request