Gold(I) Sulfide

Basic Information of Gold(I) Sulfide

CAS No.	1303-60-2
EC No.	215-123-7
Chemical Formula	Au₂S
Molecular Weight	425.93 g/mol
Appearance	Dark brown to black amorphous or finely crystalline powder
Odor	Odorless
Melting point	Decomposes >200 °C to Au + S
Boiling point	Not applicable (decomposes)
Density	approx. 9.0–9.5 g/cm³
Solubility	Insoluble in water and most organic solvents; soluble in aqua regia or hot concentrated acids
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 Gold(I) Sulfide

Gold(I) Sulfide serves as a unique Au(I)–S precursor, offering distinct reactivity and stability in sulfur-containing gold systems.

1. Organometallic Gold-Sulfur Complex Synthesis
   Acts as precursor for preparing gold(I) thiolate clusters, polymers, and molecular complexes relevant to self-assembled monolayers and luminescent materials.

2. Supported Gold-Sulfur Catalyst Preparation
   Used to deposit Au–S species on supports for selective oxidation, hydrogenation, and CO removal catalysis with sulfur-modified gold surfaces.

3. Gold Nanoparticle & Cluster Synthesis
   Enables controlled reduction or decomposition to generate Au nanoparticles or clusters with sulfur interfaces for plasmonics, sensing, and biomedical applications.

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

5. Advanced Materials Research
   Employed in studies of gold sulfide stability, Au–S bonding, mixed-metal sulfides, and functional coatings requiring gold-sulfur interactions.

6. Chemical & Materials Synthesis
   Provides a clean Au(I) source in non-aqueous or solid-state reactions where chloride-free gold introduction is desirable.

• 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 catalysis, reduction, or materials 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