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254169 Sigma-Aldrich

Gold(III) chloride hydrate

99.995% trace metals basis

Synonym: Auric chloride, Chloroauric acid, Hydrogen tetrachloroaurate(III) hydrate, Tetrachloroauric(III) acid



Related Categories Au, Catalysis and Inorganic Chemistry, Chemical Synthesis, Essential Chemicals, Gold Catalysts,
Quality Level   200
assay   99.995% trace metals basis
form   crystals and lumps
composition   Degree of hydration, ~3
reaction suitability   reagent type: catalyst
core: gold
density   3.9 g/mL at 25 °C
SMILES string   O.Cl.Cl[Au](Cl)Cl
InChI   1S/Au.4ClH.H2O/h;4*1H;1H2/q+3;;;;;/p-3


General description

The structure of gold chloride is monoclinic in nature. It sublimes at elevated temperatures.


It is used in the preparation of stable nanosized and underivatized colloidal gold particles in solution.


5 g in glass bottle

500 mg in glass insert

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
UN 3260 8 / PGIII
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How can I determine the number of hydrates present in Product 254169, Gold (III) chloride hydrate?
To determine the number of hydrates, you can use the following formula:% of the metal = [(MW of metal) (# of metal atoms)] / [(MW of anhydrous product) + (x * 18g/mol)]Solving for x:x = [[(MW of metal)(#metal atoms)] - [(%of metal in product)(MW of anhydrous product)]] / [(% of metal in product) (18 g/mol)]
What isn Product 254169, Gold (III) chloride hydrate soluble in?
This product is soluble in water, ethanol, and ether. Unfortunately we do not have any recorded concentrations.
What is the melting point of n Product 254169, Gold (III) chloride hydrate?
We have never determined the melting point, however we do have a note indicating that this compound will decompose when melted. Also the 13th Edition of the chemicals encyclopedia published by the Royal Society of Chemistry states that this compound will decompose on strong heating to form chlorine gas, hydrochloric acid gas, and metallic gold.
What is the reported purity of Product 254169, Gold (III) chloride hydratebased on, chemical or metal purity?
The purity (99.999%) is not the chemical purity, but rather the purity based on trace metal content. In the case of 99.999%a maximum of20ppm total metallic impurities would be allowed.
How do I find price and availability?
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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Protocols & Articles


Synthesis of Gold Nanorods: Avoiding Common Pitfalls

NanoHybrids Inc. 3913 Todd Ln #310, Austin, TX 78744, USA *Email: kimberly.homan@nanohybrids.net
Brantley C. Henson, Justin T. Harris, Kimberly A. Homan*
Material Matters, 2017, 12.1
Keywords: AGE, Absorption, Addition reactions, Asymmetric synthesis, Centrifugation, Clinical, Degradations, Deposition, Indicators, Industries, Infrared spectroscopy, Ligands, Microscopy, Precipitation, Purification, Reductions, Scanning electron microscopy, Separation, Spectroscopy, Transmission electron microscopy

Peer-Reviewed Papers


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