3,3'-Dimethylbenzidine, 100mg Back Catalog number: 676729 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-D Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 19494 EPA Method 524 & 624 - Internal Standard Price on request 30111 2,4,6-Trichlorophenol Price on request