27988-77-8

Basic information

• Product Name: CHLOROAURIC ACID HYDRATE
• Synonyms: GOLD TRICHLORIDE ACID;GOLD TRICHLORIDE ACID HYDRATE;GOLD CHLORIDE HYDRATE;GOLD CHLORIDE, YELLOW;HYDROGEN TETRACHLOROAURATE;HYDROGEN TETRACHLOROAURATE(+3)N-HYDRATE;HYDROGEN TETRACHLOROAURATE(III);HYDROGEN TETRACHLOROAURATE(III) HYDRATE
• CAS NO: 27988-77-8
• Molecular Formula: AuCl4H3O
• Molecular Weight: 357.8
• EINECS: 240-948-4
• Product Categories: Gold Salts;Materials Science;Metal and Ceramic Science;Salts
• Mol File: 27988-77-8.mol
• Article Data: 1

Chemical Properties

• Melting Point: decomposes [STR93]
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: yellow/Crystals or Crystalline Powder
• Density: 3.9 g/mL at 25 °C
• Storage Temp.: Refrigerator (+4°C)
• Water Solubility: Soluble in water. Insoluble in ether.
• Sensitive: Light Sensitive & Hygroscopic
• Stability: Stable, but light sensitive and very hygroscopic. Incompatible with reducing agents.
• Merck: 13,4537
• CAS DataBase Reference: CHLOROAURIC ACID HYDRATE(CAS DataBase Reference)
• NIST Chemistry Reference: CHLOROAURIC ACID HYDRATE(27988-77-8)
• EPA Substance Registry System: CHLOROAURIC ACID HYDRATE(27988-77-8)

Safety Data

• Hazard Codes: C
• Statements: 34-22-43
• Safety Statements: 45-36/37/39-26
• RIDADR: UN3260
• WGK Germany: 3
• RTECS: MD5428000
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• Hazardous Substances Data: 27988-77-8(Hazardous Substances Data)

Usage

Chemical Properties

solid

Uses

Different sources of media describe the Uses of 27988-77-8 differently. You can refer to the following data:
1. Hydrogen tetrachloroaurate(III) hydrate is used for microanalysis of rubidium, cesium and determination of alkaloids. Usually used as a harbinger for the preparation of gold (Au) nanoparticles. It is used in control rods in nuclear reactors and in the manufacture of light electric light filaments.
2. It is used in the preparation of stable nanosized and underivatized colloidal gold particles in solution.

General Description

Gold (III) chloride hydrate,also known as chloroauric acid, is used as precursor to synthesize gold nanoparticles. It also exihibits very high catalytic activity.

InChI:InChI=1/Au.4ClH.H2O/h;4*1H;1H2/q+3;;;;;/p-3/rAuCl3.ClH.H2O/c2-1(3)4;;/h;1H;1H2

Upstream product

• 7647-01-0 hydrogenchloride 
• 7732-18-5 water 
• 7440-57-5 gold 

Downstream Products

• 39929-21-0 (tetrahydrothiophene)gold(I) chloride 
• 10294-29-8 gold(I) chloride 
• 1610951-44-4 (1-methyl-2-diphenylphosphino-3-methylimidazolium)chlorogold(I) tetrachloroaurate 

Relevant articles and documents

Syntheses, crystal structures, and properties of Ln3AuO6 (Ln = Sm, Eu, Gd)

The title compounds have been prepared from amorphous Au2O3·x H2O (x = 1-3) and Ln2O3 (Ln = Nd, Sm, Eu) via solid state reaction under elevated oxygen pressure adding KOH as mineralizing agent. They crystallize in a new structure type (triclinic, P1, Z = 1, Sm3AuO6: a = 3.7272(2) A?, b = 5.6311(2) A?, c = 7.0734(3) A?, α = 90.32(2)°, β = 103.983(3)°, γ = 90.822(2)°, 125 powder intensities, Rp = 2.57%, Eu3AuO6: a = 3.7012(2) A?, b = 5.6134(2) A?, c = 7.0652(4) A?, α =90.838(3)°, β = 102.956(3)°, γ = 90.909(2)°, 122 powder intensities, Rp = 3.16%, Gd3AuO6: a = 3.6720(2) A?, b = 5.5977(2) A?, c = 7.0636(2) A?, α = 90.509(2)°, β = 102.889(3)°, γ = 91.068(2)°, 3424 reflections, R1 = 12.90%). The crystal structure was solved and refined from single crystal data of Gd3AuO6. The structures of Sm3AuO6 and Eu3AuO6 were refined from powder diffraction data. The isolated square planar AuO4 units are stacked along the a-axis and are linked by LnO6- and LnO6+1-polyhedra. One of the oxygen atoms is exclusively coordinated by trivalent lanthanides, in tetrahedral geometry. The lanthanoid aurates decompose between 700 and 900°C into Ln2O3, Au and O2. The magnetic moments μeff(Gd3AuO6) = 7.9 μB and, at 20°C respectively, μeff(Sm3AuO6) = 1.55 μB as well as μeff(Eu3AuO6) = 3.5 μB confirm that the lanthanides are trivalent. The UV/VIS absorption spectra can be interpreted at assuming free ions. Wiley-VCH Verlag GmbH, 2001.