Ruthenium(III) chloride trihydrate
CAS 13815-94-6
The trihydrate is the defined-water grade of ruthenium trichloride — preferred where formulation weight accuracy matters, from Grubbs-catalyst upstream synthesis to DSA anode coating solutions and RuO₂ materials chemistry.
Typical specification
| Molecular formula | RuCl₃ · 3H₂O |
|---|---|
| Molecular weight | 261.47 |
| Purity (metals basis) | ≥ 99.9% |
| Ruthenium content | ≥ 37.5% (certified per lot) |
| Appearance | Dark brown to black crystals |
| Water solubility | Freely soluble |
| HS code (export) | 2843900099 |
Lot-specific COA issued with every shipment. SDS and ICP elemental impurity data available on request.
Where RuCl₃·3H₂O is used
Catalyst synthesis
The universal starting material for ruthenium catalysis — metathesis precursors, (arene)Ru transfer-hydrogenation complexes and Ru/C — with defined hydration simplifying stoichiometric charging.
Electrode coatings and RuO₂ materials
Feeds RuO₂–TiO₂ anode coating formulations for chlor-alkali electrolysis and RuO₂ synthesis for resistor and supercapacitor materials.
Storage and shipping
Storage. Store tightly sealed and dry; hygroscopic. Solutions slowly hydrolyze — stabilize in dilute HCl.
Shipping. Ships in sealed fluorinated bottles with SDS.
Packaging. 5 g · 25 g · 100 g · 500 g · Solution grades by contained Ru weight
Synonyms
- Ruthenium trichloride trihydrate
- RuCl3 3H2O
- Ruthenium chloride trihydrate
Frequently asked questions
Trihydrate or variable hydrate (CAS 14898-67-0)?
Chemically interchangeable in most uses; the trihydrate's defined water content simplifies formulation math, while the variable hydrate is often cheaper per gram of Ru. Both settle on assayed metal.
How is pricing structured?
Quotes reference the day's ruthenium price on assayed contained metal plus a stated conversion charge; ruthenium's low price among PGMs makes it the economical choice wherever it can do the job.
Do you take back spent material?
Yes — spent catalyst, coating residues and off-spec lots are assayed on receipt and the recovered ruthenium credited against your next order.