Tetrachloroauric acid trihydrate

Tetrachloroauric acid trihydrate (CAS 16961-25-4), commonly known as chloroauric acid, is a gold-bearing inorganic acid used as the primary commercial source of soluble gold in industrial and laboratory settings.

It serves as a foundational reagent wherever controlled deposition, reduction, or catalytic activation of gold is required. In electronics manufacturing, it is used in gold electroplating and electroless plating baths.

These baths deposit conductive gold layers on printed circuit boards, connectors, and semiconductor contacts. Catalyst producers use it to prepare supported gold nanoparticle catalysts for various industrial uses.

Precise gold loading on oxide supports determines activity in oxidation and hydrogenation reactions. In mining and precious metals refining, it functions as a reference standard and analytical reagent.

It is essential for gold assay and recovery process development. Specialty chemical manufacturers also use it to produce other gold compounds and colloidal gold dispersions for diagnostic and research applications.

Tetrachloroauric acid trihydrate is supplied as a yellow crystalline solid, typically in small-quantity packaging suited to its high unit value. It is available in reagent-grade and technical-grade specifications.

Purity levels are commonly stated on a gold-content basis. Buyers should confirm gold assay, moisture content, and packaging integrity as standard sourcing criteria for this high-value chemical product.