| Identification | More | [Name]
Gold trichloride | [CAS]
13453-07-1 | [Synonyms]
CHLORAUIC ACID
CHLOROAURIC ACID
CHLOROAURIC ACID BROWN
CHLOROAURIC ACID YELLOW
GOLD ATOMIC SPECTROSCOPY STANDARD
GOLD CHLORIDE
GOLD CHLORIDE (ACID YELLOW)
GOLD CHLORIDE, BROWN
GOLD TRICHLORIDE ACID BROWN
GOLD TRICHLORIDE ACID YELLOW
HYDROGEN TETRACHLOROAURATE (III)
TETRACHLOROAURIC ACID
auricchloride
aurictrichloride
goldchloride(aucl3)
GOLD(III) CHLORIDE, 99.99+%
2GoldChlorideAcid(AuCl3)
Gold(III)chloride,99%(99.9%-Au)
gold(iii) chloride, premion
GOLD(III) CHLORIDE (99.9% AU) | [EINECS(EC#)]
240-948-4 | [Molecular Formula]
AuCl3 | [MDL Number]
MFCD00011322 | [Molecular Weight]
303.33 | [MOL File]
13453-07-1.mol |
| Chemical Properties | Back Directory | [Appearance]
orange-red to dark red crystals | [Melting point ]
254°C | [Boiling point ]
265 °C | [density ]
3.9 g/mL at 25 °C
| [storage temp. ]
2-8°C
| [form ]
Crystalline Powder, Crystals or Chunks | [color ]
yellow
| [Water Solubility ]
soluble | [Sensitive ]
Hygroscopic | [Merck ]
14,4521 | [Solubility Product Constant (Ksp)]
pKsp: 24.5 | [Uses]
Photography, gold plating, special inks,
medicine, ceramics (enamels, gilding, and painting
porcelain), glass (gilding, ruby glass), manufacture
of finely divided gold and purple of Cassius. | [CAS DataBase Reference]
13453-07-1(CAS DataBase Reference) | [EPA Substance Registry System]
13453-07-1(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C,Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S37/39:Wear suitable gloves and eye/face protection .
S36:Wear suitable protective clothing . | [RIDADR ]
UN 3260 8/PG 3
| [WGK Germany ]
3
| [RTECS ]
MD5420000
| [F ]
3-8-10 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
28433000 | [Safety Profile]
Experimental
reproductive effects. Human mutation data
reported. Reaction with ammonia or
ammonium salts yields fulminating gold, a
heat-, friction-, and impact-sensitive
explosive similar to mercury and silver
fulminates. See also GOLD COMPOUNDS
and CHLORIDES. When heated to
decomposition it emits toxic fumes of Cl-. |
| Questions and Answers (Q&A) | Back Directory | [Preparation]
Gold(III) chloride may be produced by the combination of metallic gold with chlorine gas at elevated temperatures:
2Au + 3Cl2 → 2AuCl3
It may be prepared in the laboratory by the reaction of iodine monochloride with metallic gold:
2Au + 6ICl → 2AuCl3 + 3I2
The compound should be stored tightly closed and protected from light.
| [Reactions]
When heated at 254ºC, gold(III) chloride decomposes to gold(I) chloride and chlorine.
Passing hydrogen sulfide into an ether solution of the compound yields gold(III) sulfide, Au2S3.
A similar reaction occurs when alcoholic solutions of gold(III) chloride and hydrogen selenide are mixed, producing gold(III) selenide, Au2Se3, a black amorphous solid.
Gold(III) chloride may be reduced readily to metallic gold by common reducing agents. Thus, reduction with stannous chloride in dilute aqueous medium yields colloidal gold in which the atom carries a negative charge. “Cassius purple” is produced from the oxidation of tin to form H2Sn(OH)6, which protects colloidal gold from coagulation, imparting ruby red color to the solution.
Gold(III) chloride reacts with ammonia forming a gold(III)-nitrogen derivative, an explosive product, known as, “fulminate of gold”. Reaction with Grignard reagent, RMgX in ether yields dialkyl gold(III) chloride, R2AuCl3, which may be converted readily to other dialkyl gold(III) complexes by replacement of the chloride anion by a donor ligand.
|
| Hazard Information | Back Directory | [Chemical Properties]
orange-red to dark red crystals | [Physical properties]
Red monoclinic crystals; deliquesces; density 4.7 g/cm3; sublimes at 180°C (760 torr); highly soluble in water; soluble in alcohol and ether; slightly soluble in liquid ammonia. | [Definition]
A compound prepared by
dissolving gold in aqua regia. The bright
yellow crystals (chloroauric acid) produced
on evaporation are heated to form dark red
crystals of gold(III) chloride. The chloride
decomposes easily (at 175°C) to give
gold(I) chloride and chlorine; at higher
temperatures it decomposes to give gold
and chlorine. Gold(III) chloride is used in
photography. It exists as a dimer, Au2Cl6. | [General Description]
The structure of gold chloride is monoclinic in nature. It sublimes at elevated temperatures. |
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