Urban dust - Organic contaminants, 2g Back Catalog number: NIST-1649B Availability: In the manufacturer's stock Price on request - + Recommended 0402.23-150-CYX5 n-Tricosane, ?13C: -26.71, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no. 638-67-5 Price on request 672925 Thidiazuron, 250mg Price on request S-4436-10-IO Hopane/Sterane Calibration Mix, 12 components, 10µg/ml in Isooctane, 1ml Price on request