4,4'-DDD, 250mg Back Catalog number: 677528 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 92270 Citric acid [3% wt] Price on request 0355.26-10MG 9,10-Diphenylanthracene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 1499-10-1 Price on request 52143 EPA 1620 Standard 5 Price on request