Molekula
Tetrachloroaurate (III) acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Tetrachloroaurate (III) acid (HAuCl4) is a gold(III) chloride complex supplied as a crystalline solid, widely used in electronics for gold plating, catalysis, and as a precursor in nanotechnology and chemical synthesis. It appears as gold or yellow-red crystals, highly soluble in water and polar solvents. This hazardous chemical requires careful handling due to its corrosive and toxic properties. CAS 16903-35-8 | Molecular formula HAuCl4 | Molecular weight 339.79 g/mol | Storage at ambient conditions | Signal word: Danger.
Molekula supplies Tetrachloroaurate (III) acid at ≥99.9% purity in 1 g packs, from £274.92 inc. VAT. It is in stock for same-day dispatch. Every batch ships with a certificate of analysis, and safety data sheets are available in 6 languages. Larger quantities, up to multi-tonne, are quoted on request.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 g — £229.10 per pack ex VAT · £274.92 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Gold or yellow red crystal |
| Purity | ≥99.9% |
| Iron (Fe) | ≤0.005% |
| Lead (Pb) | ≤0.0005% |
| Calcium (Ca) | ≤0.005% |
| Copper (Cu) | ≤0.005% |
| Magnesium (Mg) | ≤0.005% |
| Zinc (Zn) | ≤0.005% |
| Chromium (Cr) | ≤0.005% |
| Manganese (Mn) | ≤0.005% |
| Silver (Ag) | ≤0.005% |
| Aluminium (Al) | ≤0.005% |
| Silicon (Si) | ≤0.005% |
| Gold (Au) | ≥50% |
| Platinum (Pt) | ≤0.005% |
| Ruthenium (Ru) | ≤0.005% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 10189401 |
| CAS Number | 16903-35-8 |
| Molecular Formula | HAuCl4 |
| Molecular Weight | 339.79 |
| SMILES | [H+].[Cl-][Au+3]([Cl-])([Cl-])[Cl-] |
| UN Number | UN3260 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2843300000 |
| Tariff Code | 2843300000 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- EUH071 Corrosive to the respiratory tract
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H373 May cause damage to organs through prolonged or repeated exposure
- H411 Toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+312 IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P337+313 If eye irritation persists get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Tetrachloroaurate (III) acid (HAuCl4) commonly used for?
Tetrachloroaurate (III) acid is primarily used in gold plating, electronics manufacturing (e.g., semiconductor fabrication), and as a precursor for gold nanoparticle synthesis in research and industrial applications.
What is the molecular formula and molecular weight of Tetrachloroaurate (III) acid?
The molecular formula is HAuCl₄, and the molecular weight is 339.79 g/mol.
What safety classification does Tetrachloroaurate (III) acid fall under?
It is classified with the signal word 'Danger' due to its corrosive and hazardous properties. Always handle with appropriate PPE and ventilation.
How should Tetrachloroaurate (III) acid be stored?
Store in a cool, dry place at ambient temperature, away from incompatible substances (e.g., strong oxidizers, metals). Keep containers tightly sealed.
Does Molekula supply Tetrachloroaurate (III) acid in bulk quantities?
Yes, we offer bulk quantities of Tetrachloroaurate (III) acid, with flexible packaging options (e.g., drums, bottles) based on customer requirements.
What documentation is provided with an order of Tetrachloroaurate (III) acid?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a compliance certificate for purity and traceability.
Where can I buy Tetrachloroaurate (III) acid?
Directly from Molekula, which lists Tetrachloroaurate (III) acid in 1 g packs from £274.92 inc. VAT, with a certificate of analysis for every batch. Larger quantities are quoted on request. Molekula's offices: United Kingdom, France, Spain, Germany, Italy, United States and China.
Is Tetrachloroaurate (III) acid dangerous goods for shipping?
Yes. Tetrachloroaurate (III) acid ships as dangerous goods: UN3260, class 8, packing group III.
Ready to order or need a custom pack?
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