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 679460 2,4'-DDT, 100 µg/ml, Methanol, 1ml Price on request 33005 EPA Method 502/524 Fortification Solution Price on request 71678 trans-beta-Carotene Price on request