Digold Trioxide

Basic Information of Digold Trioxide

CAS No.	1303-58-8
EC No.	215-122-1
Chemical Formula	Au₂O₃
Molecular Weight	441.93 g/mol
Appearance	Dark brown to black amorphous or finely crystalline powder
Odor	Odorless
Melting point	Decomposes ~160 °C to Au + O₂
Boiling point	Not applicable (decomposes)
Density	approx. 11.0–11.5 g/cm³
Solubility	Insoluble in water; soluble in hot concentrated acids (e.g., aqua regia, HCl + HNO₃)
Nature (hazards)	May cause respiratory irritation, skin and eye irritation, harmful if inhaled as dust, toxic to aquatic life
RIDADR	Not regulated (non-hazardous for transport under standard classifications; consult SDS for specific handling)
Chemical Structure

Primary Applications of Digold Trioxide

Digold Trioxide serves as a unique Au(III) oxide source, offering high oxidation state and facile reduction to metallic gold in catalytic and materials processes.

1. Supported Gold Catalyst Preparation
   Used as a precursor for depositing Au on various supports (carbon, alumina, TiO₂) via reduction or decomposition, yielding active catalysts for CO oxidation, selective alcohol oxidation, and hydrogenation.

2. Gold Nanoparticle Synthesis
   Enables controlled reduction to generate Au nanoparticles or clusters with unique electronic properties for plasmonics, sensing, and biomedical applications.

3. Heterogeneous Oxidation Catalysis
   Exhibits activity in low-temperature oxidation of CO, aldehydes, and hydrocarbons, useful in emission control and fine chemical production.

4. Thin-Film & Surface Modification
   Serves as a source for gold oxide thin films or surface layers in microelectronics, sensors, and plasmonic devices via thermal or chemical decomposition.

5. Advanced Materials Research
   Employed in studies of gold oxide stability, mixed-metal oxides, and functional coatings requiring high gold oxidation state.

6. Chemical & Materials Synthesis
   Provides a clean Au(III) source in non-aqueous or solid-state reactions where chloride contamination is undesirable.

• High Gold Content & Purity
  Precise analytical control ensures consistent Au content, optimal crystallinity, and high active surface area for maximum performance.

• Custom Material Specifications
  Tailored purity, particle morphology, surface area, and supported variants to perfectly align with your oxidation, reduction, or energy application.

• Consistent Batch-to-Batch Reproducibility
  Rigorous testing (ICP, XRD, BET, activity assays) guarantees low variation and predictable performance during scale-up and production.

• Secure Gold Supply Chain
  Responsible sourcing, strategic inventory management, and transparent pricing mitigate volatility and ensure long-term availability.

• Technical & Regulatory Support
  Expert team provides guidance on reduction protocols, catalyst activation, performance optimization, and full documentation (COA, REACH, SDS) for seamless integration.

Hazards Classification

• GHS Classification: Skin Irritation (Category 2); Eye Irritation (Category 2A); Specific Target Organ Toxicity, Single Exposure (respiratory) (Category 3); Aquatic Chronic (Category 3)

• Hazard Statements: H315: Causes skin irritation; H319: Causes serious eye irritation; H335: May cause respiratory irritation; H413: May cause long lasting harmful effects to aquatic life

• UN Number: Not regulated

• Hazard Class: Not classified as hazardous for transport

• Packing Group: Not applicable