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 sulfate is a white, light-sensitive crystalline solid used chiefly in analytical chemistry, as the catalyst in dichromate chemical oxygen demand (COD) determinations and to precipitate interfering chloride, and as a silver source for cyanide-free silver plating baths and for halide abstraction in synthesis. Approximately 69.2% silver by mass; each lot is assayed and ships with a certificate of analysis.

Grade

≥99.9% (metals basis), ACS reagent grade; Ag ≥ 68.5%

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

Palladium(II) chloride is a dark red-brown, hygroscopic solid and the most common entry point to palladium chemistry. It is the precursor to PdCl2(PPh3)2, PdCl2(dppf), PdCl2(MeCN)2, sodium and potassium tetrachloropalladate and tetraamminepalladium salts; the catalyst of the Wacker oxidation; a source for Pd/C and other supported hydrogenation catalysts; and the sensitiser used in electroless plating activation. It is also used in carbon monoxide detectors and test papers. Approximately 60% palladium by mass; each lot is assayed and released with a certificate of analysis.

Grade

≥99.9% (metals basis); Pd ≥ 59.5%

Pack sizes

1 g, 5 g, 25 g, 100 g

Palladium(II) nitrate dihydrate is a water-soluble, brown, hygroscopic palladium salt used to prepare supported palladium catalysts by impregnation (automotive three-way and diesel oxidation catalysts, Pd/Al2O3, Pd/C), as a chemical matrix modifier in graphite-furnace atomic absorption spectrometry, as a halide-free palladium source for palladium nanoparticles and electrocatalysts, and in palladium plating. Approximately 40% palladium by mass; supplied with a lot-specific palladium assay.

Grade

≥99.9% (metals basis); Pd ≈ 40%

Pack sizes

5 g, 25 g, 100 g

Potassium hexachloroplatinate(IV) is a yellow to orange crystalline platinum(IV) salt, sparingly soluble in water, used as a stable platinum precursor for supported Pt catalysts and fuel-cell electrocatalysts (Pt/C by reduction), platinum nanoparticles and sols, and as a defined platinum standard. It is the classical gravimetric form for potassium and a key intermediate in platinum refining. A respiratory and skin sensitiser: handle only with dust containment. Approximately 40% platinum by mass; each lot is assayed and ships with a certificate of analysis.

Grade

≥99.9% (metals basis); Pt ≈ 40%

Pack sizes

1 g, 5 g, 25 g

Ammonium hexachloroplatinate(IV) is a yellow to orange crystalline platinum(IV) salt, sparingly soluble in water, that decomposes cleanly on heating to platinum sponge, the classical route to high-purity platinum and platinum black. It is used to prepare supported platinum catalysts, fuel-cell electrocatalysts, platinum nanoparticles and platinum coatings, and as the platinum intermediate in refining and recovery. A respiratory and skin sensitiser: handle only with dust containment. Approximately 44% platinum by mass; each lot is assayed and released with a certificate of analysis.

Grade

≥99.9% (metals basis); Pt ≈ 44%

Pack sizes

1 g, 5 g, 25 g