Gold(III) chloride solution
Gold(III) chloride solution, CAS 16903-35-8, with the linear formula HAuCl₄, presents as a liquid with a molecular weight of 339.79 g/mol. This high-purity solution, assaying 99.99% trace metals basis and containing 17 wt.% gold, is primarily utilised in the preparation of stable, nanosized colloidal gold particles for various scientific applications. Its density is 1.637 g/mL at 25 °C.

Colloidal Gold Synthesis
Gold(III) chloride solution serves as a precursor for synthesising stable, nanosized colloidal gold particles. This application is crucial in nanotechnology and materials science for creating gold nanoparticles with specific properties.
Materials Science Research
This compound is employed in materials science for the development and study of novel gold-based materials. Its well-defined composition aids in research requiring precise control over material properties at the nanoscale.
Nanoparticle Preparation
Used for the preparation of underivatized colloidal gold particles in solution, this reagent is vital for researchers in fields requiring well-characterised gold nanoparticles for diagnostic or catalytic applications.
| Molecular weight | 339.79 |
|---|---|
| Linear formula | HAuCl4 |
| Assay | 99.99% trace metals basis |
| Form | liquid |
| Density | 1.637 g/mL at 25 °C |
| Concentration | 30 wt. % in dilute HCl |
| Application | Used in preparation of stable nanosized and underivatized colloidal gold particles in solution.1 |
| Composition | Au, 17 wt. % |


Hazard statements
- H314Causes severe skin burns and eye damage
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Transport (UN / ADR) | UN 3264 8 / PGII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34-43 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Gold(III) chloride solution used for?
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Gold(III) chloride solution (CAS 16903-35-8) is primarily used in the preparation of stable nanosized and underivatized colloidal gold particles in solution, finding applications in materials science and nanotechnology research.
What are the CAS number and formula for Gold(III) chloride solution?
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The CAS number for Gold(III) chloride solution is 16903-35-8, and its linear formula is HAuCl₄.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Gold(III) chloride solution with an assay of 99.99% trace metals basis. This product is not represented as USP, BP, EP, or pharmacopoeia grade.
How should Gold(III) chloride solution be handled safely?
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Gold(III) chloride solution is corrosive and may cause an allergic skin reaction. Handle with appropriate personal protective equipment, including gloves and eye protection. Avoid contact with skin and eyes, and ensure adequate ventilation. Refer to the Safety Data Sheet for detailed handling instructions.
Is Gold(III) chloride solution shipped internationally?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Gold(III) chloride solution, and can facilitate international shipments.
How can I request a quote or sample for Gold(III) chloride solution?
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To request a quote or sample of Gold(III) chloride solution, please contact our sales team through the website or via email, providing your contact details and the product information.
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