Internal Standard Back Catalog number: 96651 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 680963 Imidazole, 250mg Price on request 1089.22-K-TX5 Benzo[ghi]perylene-d12, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 93951-66-7 Price on request 1541.13-K-TX5 2-Aminofluorene-d11, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 34741-44-5 Price on request