4,4’-Diamino-3,3’-dimethyldiphenylmethane Back Catalog number: 98529 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95552 Aroclor 1221 Price on request 1145.25-K-IO n-Pentacosane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 629-99-2 Price on request 92793 BTEX Standard Price on request