Chloroplatinic Acid

NAME:Chloroplatinic Acid 16941-12-1 Used for platinum plating and platinum catalyst,immortalization ink and platinum mirror.

Name:Chloroplatinic Acid MF: H2PtCl6·6H2O

MW: 517.90

CAS: 18497-13-7

EINECS: 241-010-7

Brand name:WENDA

Physical and chemical property:

Density: 2.431 g/cm^3

Melting point: 60°C

appearance: red-brown crystals

Deliquescent. Soluble in water, ethanol, ethyl ether.

Content: Pt, %: ≥37.0%

Dangerous mark:  T  

Hazard class: R25;R34;R42/43  

Safety instruction: S22;S26;S36/37/39;S45 

UN 1789/2507

Storage: 1g/ 10g/ glass bottle.

Use: used for platinum plating and platinum catalyst, immortalization ink and platinum mirror and so on.

Storage conditions: seal, in the dry presercation

Applications

Potassium determination

Chloroplatinic acid was popularized for the determination of potassium. The potassium is selectively precipitated as potassium chloroplatinate. Determinations were done in 85% (v/v) alcohol solutions with excess platinate ions, and the precipitated product was weighed. Potassium could be detected for solutions as dilute as 0.02 to 0.2% (m/v)

This method for determination of potassium was advantageous vs. the cobaltinitrite method used previously, since it required a single precipitation reaction.Today, the concentration of potassium is determined with an ion-selective electrode. These modern methods remain subject to interference.

Purification of platinum

Treatment with an ammonium salt, such as ammonium chloride, gives ammonium hexachloroplatinate,which is very insoluble in ammonium solutions. Heating the ammonium salt in hydrogen reduces it to elemental platinum. Platinum is often isolated from ores or recycled from residues thus.

Catalysis

Like many platinum compounds, chloroplatinic acid is used in catalysis. This compound was first reported by John Speier and colleagues from Dow Corning Corporation to catalyze the reaction of silyl hydrides with olefins, hydrosilylation. Typical of his reactions, Speier used isopropanol solutions containing trichlorosilane (SiHCl3), and methyldichlorosilane (CH3HSiCl2), with pentenes. Prior work on the addition of silanes to alkenes required radical reactions that were inefficient. It is generally agreed that chloroplatinic acid is a catalyst precursor, and more recent discussions have considered a possible role for colloidal platinum or zero-valent complexes.

Storage: