4,4’-DDD Back Catalog number: 79148 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11809.12-50-NN 2,3,7,8-Tetrachlorodibenzofuran,50 µg/mL,n-nonane,1mL, Price on request DF-LCS-B Mass-Labelled PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 3044.8-K-ME p-Xylene-d10, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 41051-88-1 Price on request