Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended 8743.18-100-T 4-Chloroterphenyl, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. Price on request 30012 EPA Method 506 - Phthalates & Adipates Price on request 11347.18-K-ME Hydroxychloroquine sulfate,1000 µg base/mL,MeOH,1mL, Price on request