Hexachlororhodic(III) acid solution, Rh 5.8%

Hexachlororhodic(III) acid solution H₃[RhCl₆] with a mass fraction of rhodium 5.8%

Substance identification

This is a solution of hexachlororhodic(III) acid with the [RhCl₆]³⁻ complex. The formula H₃[RhCl₆], dark-red color, and solution form are consistent with industrial rhodium chloride solutions in hydrochloric acid. The Rh content of 5.8% applies to this card.

Confirmed characteristics

• Form of supply: aqueous acidic solution
• Complex form: H₃[RhCl₆]
• Rhodium: 5.8% per TU 5P-60-71
• Appearance: dark-red solution
• Item number: 5162711

Applications and preparation

The solution is used as a rhodium precursor in laboratory synthesis of complexes, supported catalytic materials, and electroplating studies, where specified by the procedure. Its properties are determined by the Rh concentration, free acid, chloride, and impurities. It must not be replaced with dry RhCl₃ or a solution of another concentration without recalculation and verification of the medium.

Dosing is carried out based on rhodium analysis and batch density, using acid-resistant volumetric glassware. When diluting, the acidic solution is added to water according to an approved procedure with cooling. For deposition onto a support, pH, chloride, and pore volume are controlled. Material without a certificate of certified concentration is not used as a calibration standard.

What to confirm before ordering

Request CoA and SDS with mass fraction of Rh, free HCl, density, net volume or mass, and impurities. Clarify the analysis method, container material, and storage temperature conditions. For synthesis, specify allowable alkali metals and other PGM; for deposition, specify the limit for insoluble residue and stability upon dilution.

Safe handling

The acidic chloride solution is corrosive and contains a rhodium compound. Work in a fume hood, use safety glasses or a face shield, acid-resistant gloves, and clothing per SDS. Do not inhale aerosol and do not mix with incompatible substances. Spills are neutralized only per emergency instructions; solutions and containers are collected separately for metal recovery.