Precious metal compounds

High-purity silver nitrate for analytical, photographic, electrochemical and synthetic use. The standard precursor for silver nanoparticles, silver halide chemistry, Tollens' reagent, argentometric titration (Mohr, Volhard, Fajans), silvering of mirrors and silver electroplating baths. Supplied as free-flowing crystals with a lot-specific certificate of analysis including silver assay and trace-metal screen.

Grade

≥99.9% (metals basis), ACS reagent grade

Pack sizes

25 g, 100 g, 500 g, 1 kg

Silver(I) oxide is a dark brown-black, light-sensitive powder used as a mild oxidant and base in organic synthesis: Koenigs–Knorr glycosylation, O-alkylation of sensitive substrates, oxidation of aldehydes to carboxylic acids, and the preparation of silver carboxylates and silver N-heterocyclic carbene (NHC) transfer agents. It is the cathode material of silver-oxide button cells, a precursor for silver catalysts and conductive silver films, and a yellow colourant for glass and ceramic glazes. Decomposes cleanly to silver and oxygen above about 280 °C. Each lot is assayed for silver and released with a certificate of analysis.

Grade

≥99.9% (metals basis); Ag ≥ 92.5%

Pack sizes

25 g, 100 g, 500 g

Silver chloride is a white, water-insoluble, photosensitive solid that darkens on exposure to light. It is the active layer of Ag/AgCl reference electrodes and pH and ion-selective reference systems, a light-sensitive component of photographic emulsions and photochromic glass, an infrared-transmitting window material, and an antimicrobial agent in coatings and textiles. Approximately 75.3% silver by mass; supplied as a free-flowing powder with lot-specific assay.

Grade

≥99.9% (metals basis); Ag ≥ 74.5%

Pack sizes

25 g, 100 g, 500 g

Chloroauric acid trihydrate is the workhorse gold precursor for colloidal gold and gold nanoparticle synthesis (Turkevich, Brust–Schiffrin, seeded growth), homogeneous gold catalysis, electroless and electrolytic gold plating, immunogold labelling for electron microscopy, ruby glass and Purple of Cassius, and gold-based pharmaceuticals research. Each lot is assayed for gold content and supplied with a certificate of analysis.

Grade

≥99.9% (metals basis); Au ≈ 50%

Pack sizes

1 g, 5 g, 25 g