Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended EN-1948STK PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 9325.10-K-ME Linalool-d3 (vinyl-d3), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1216673-02-7 Price on request 57114 Silicon (Si) Price on request