4,4’-DDD Back Catalog number: X9054 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9461.10-100K-ME Spermine, 100mg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 71-44-3 Price on request E649952 Erythromycin-13C,d3, 1mg Price on request 1366.8-25G N,O-Bis(trimethylsilyl)trifluoroacetamide, neat, Solvent-neat, Unit 25g, # of units-1, Cas.no. 25561-30-2 Price on request