Potassium hexachloroiridate(IV), CAS 16920-56-2

Potassium hexachloroiridate(IV) K₂IrCl₆, an iridium(IV) complex salt with CAS 16920-56-2

Substance identification

The name, formula K₂IrCl₆, and CAS 16920-56-2 correspond to potassium hexachloroiridate(IV). In the anion [IrCl₆]²⁻, iridium has an oxidation state of +4. The theoretical Ir content is close to 39.8%, so the range 38.7–39.9% specified in the historical TU is consistent with this formula, but the actual value applies only to the certificate of a specific batch.

Confirmed characteristics

• CAS: 16920-56-2
• Formula: K₂IrCl₆
• Iridium: 38.7–39.9% per TU 6-09-05-871-78
• Appearance: black crystals
• Item number: 5162747

Applications and preparation

The compound is used as a laboratory iridium precursor in coordination chemistry, synthesis of other complexes, and research catalytic materials. The result depends on purity, water, acidity, and alkali metal impurities.

Weigh the sample based on K₂IrCl₆, purity, and required iridium content. Solubility and reduction should be checked on a test scale using an approved procedure. Do not substitute with hexachloroiridate(III): a different oxidation state changes the complex charge, stoichiometry, and reactivity. For analysis, use a separate certified standard.

What to confirm before ordering

In your request, specify CAS 16920-56-2, K₂IrCl₆, Ir range, allowable metal impurities, and pack size. Request CoA and SDS, clarifying moisture, appearance, iridium determination method, and storage conditions. If complex synthesis is important, agree on limits for chloride, potassium, and reduction products, as well as the need for additional purification.

Safe handling

Avoid getting dust and solution into eyes, skin, and respiratory tract. Work in a fume hood, use safety glasses, laboratory clothing, and compatible gloves per the batch SDS. Do not mix with reducing agents or other reagents outside a verified procedure. Collect all residues and washings separately as iridium-containing waste.