1,3-Bis(4-nitrophenyl)urea, 50mg Back Catalog number: 680032 Manufacturer: HPC STANDARDS GmbH Availability: In the manufacturer's stock Price on request - + Recommended 53066 Spiking Standard 3 Price on request 81203 EPA Method 8121 Internal Standard Price on request 3886.9-10MG 3-Methylindole, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 83-34-1 Price on request