CAS 16903-35-8 Chloroauric acid - Materials / Alfa Chemistry

NAVIGATION

Chloroauric acid

PRICE INQUIRY

Catalog Number

ACM16903358-1

CAS Number

16903-35-8

Product Name

Chloroauric acid

Structure

Category

Electrolytes

Synonyms

Hydrogen tetrachloroaurate(III) solution

Molecular Weight

339.79

Molecular Formula

HAuCl4

Boiling Point

100 °C

Melting Point

30 °C

Purity

99%+

Density

3.9 g/mL at 25 °C (lit.)

Solubility

Miscible with water, alcohol, ester, ether and ketone

Appearance

Yellow liquid

Application

Chlorine acid is mainly used for alkaloid determination, electroplating gold, photography, gold powder, porcelain coloring, red glass manufacturing, special ink and treatment of tuberculosis. It can also be used as analytical reagent, such as microanalysis of rubidium (Rb) and cesium (Cs). It is used for semiconductor, electronic connector and local gold-plated of integrated circuit lead frame, also for printing circuit boards.The HCl plus the HNO2
(hydrochloric and nitric acids) are combined to produce agua regia acid, which is the only
acid that can dissolve gold.

Storage

2-8 °C

Hazard Statements

H302-H314-H317

MDL Number

MFCD00149903

Safety Description

Danger

UN Number

UN 3260 8 / PGIII

MSDS

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet

Case Study

In-Situ Reduction of Chloroauric Acid to Prepare Au@COPN Catalyst

Dursun S, et al. RSC advances, 2019, 9(66), 38538-38546.

Covalent organic polymer networks (COPN) are used as catalyst supports due to their stable and good structure. The simple synthesis of gold nanoparticles embedded in triazine-based covalent organic polymer networks (Au@COPN-1) was achieved by in situ reduction of gold ions in chloroauric acid (HAuCl4).
Synthetic route for in situ reduction of chloroauric acid
· COPN-1 was first synthesized through the reaction of tris(2,3-epoxypropyl)isocyanurate and melamine.
· Add gold (III) chloride trihydrate (10 mg, 0.0254 mmol) in 1 mL of distilled water dropwise to the COPN-1 solution under continuous stirring, and stir for 12 hours.
· Insert the flask containing the mixture of HAuCl4 ·3H2O and COPN-1 into an oil bath at 100°C. After heating for 3 hours, the mixture was cooled to room temperature. The crude product was washed and dried to obtain a dark red solid product.

Chloroauric Acid Reacts with Histidine in Microdroplets to Produce Catalytically Active Substances

Luo K, et al. Chemical Science, 2020, 11(9), 2558-2565.

An electroacoustic spray ionization (ESSI) strategy can be used to prepare the catalytically active species Au-(His)2 from the droplet reaction of chloroauric acid and histidine. Furthermore, microdroplet reaction using Au-(His)2 complex as catalyst was scaled up by room temperature ultrasonic atomization.
· Electroacoustic spray ionization (ESSI)
A sample solution containing histidine (100 μM) and chloroauric acid (10 μM) was sprayed from the fused silica capillary tip of the nebulizer and supplemented with dry N2 nebulizing gas at a pressure of 120 psi. The aqueous droplet reaction of chloroauric acid and histidine produces a transient intermediate in which Au bridges two histidine ligands, namely Au-(His)2.
· Ultrasonic atomization droplets
Inject HAuCl4 (10 mM, 100 μL) and histidine (100 mM, 100 μL) solutions into a UN pool containing 900 μL aqueous solution. The reaction time is 12 minutes to generate Au-(His)2 complex. Then, solutions of phenylacetylene (200 mM, 100 μL) and indoline (100 mM, 100 μL) in acetonitrile were added to the same glass spray cell for further ultrasonic atomization to induce in situ catalysis of the enamine reaction.

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