gold trichloride
gold trichloride
CAS: 13453-07-1
Molecular Formula: AuCl3
gold trichloride - Names and Identifiers
| Name | gold trichloride |
| Synonyms | auricchloride Gold(Ⅲ) chloride gold trichloride aurictrichloride Gold(III) chloride goldchloride(aucl3) TETRACHLOROAURIC ACID GOLD TRICHLORIDE ACID BROWN GOLD TRICHLORIDE ACID YELLOW HYDROGEN TETRACHLOROAURATE (III) GOLD ATOMIC SPECTROSCOPY STANDARD |
| CAS | 13453-07-1 |
| EINECS | 236-623-1 |
| InChI | InChI=1/Au.3ClH/h;3*1H/q+3;;;/p-3/rAuCl3/c2-1(3)4 |
gold trichloride - Physico-chemical Properties
| Molecular Formula | AuCl3 |
| Molar Mass | 303.33 |
| Density | 3.9g/mLat 25°C |
| Melting Point | 254°C |
| Boling Point | 265 °C |
| Water Solubility | soluble |
| Appearance | Crystalline Powder, Crystals or Chunks |
| Color | yellow |
| Solubility Product Constant(Ksp) | pKsp: 24.5 |
| Merck | 14,4521 |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Sensitive | Hygroscopic |
gold trichloride - Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | 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 the label whenever possible.) S37/39 - Wear suitable gloves and eye/face protection S36 - Wear suitable protective clothing. |
| UN IDs | UN 3260 8/PG 3 |
| WGK Germany | 3 |
| RTECS | MD5420000 |
| FLUKA BRAND F CODES | 3-8-10 |
| TSCA | Yes |
| HS Code | 28433000 |
| Hazard Class | 8 |
| Packing Group | III |
gold trichloride - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | gold chloride is a golden yellow crystal, easily hygroscopic deliquescence. By adding cold potassium hydroxide to the solution, an orange-red gold hydroxide Au(OH)3 precipitate can be obtained. Ions, such as Cl-or CN-, which are capable of supplying an electron pair, can form [AuCl4]-and [Au(CN)4]-complex ions. It is mainly used in gold plating, photo industry and a variety of gold compound production industry, is an important raw material for the production of other gold containing fine chemical products. |
| gold trichloride | gold trichloride, also known as "gold chloride", has the chemical formula AuCl3, molecular weight 303.33, yellow or ruby-colored crystals, easy deliquescence, relative density 3.9,265 degrees C sublimation. Soluble in cold water, strong acidic aqueous solution, soluble in ethanol, ether, slightly soluble in ammonia and chloroform, insoluble in CS2. Decomposition was achieved by heating to 254 °c. Dissolve in hydrochloric acid to generate golden yellow needle Crystal chloroauric acid HAuCl4 · 4H2O. It can be prepared by reacting gold and aqua regia or with excess chlorine at 200 ° C. For photography, gold plating, special ink, medicine, porcelain gold and red glass, etc. gold trichloride is the main salt in the sulfite gold plating process. The sulfite gold plating solution is a non-cyanide plating solution, which is non-toxic, has good dispersion and covering ability, high cathode current efficiency and fast deposition speed. The crystal of the coating is bright and fine, the pores are few, and the coating has good adhesion with copper, silver, nickel and other base metals or intermediate coatings. Sulfurous acid gold plating process is a cyanide-free electroplating gold process with industrial value. Gold trichloride (AuCl3) is commonly used in the preparation of plating solution. During the preparation, the gold trichloride is dissolved in distilled water, and under cooling conditions (a small amount of the preparation is cooled with flowing water, and a large amount of the preparation is cooled with ice saline), Slowly neutralize to pH 7~8 with about 40% potassium hydroxide solution to obtain blood-red transparent potassium chloroaurate (KAuCl4) solution, slowly pour this solution into ammonium sulfite or sodium sulfite solution, first, a light yellow transparent solution is obtained, and then heated to 55-60 ° C. And continuously stirred to obtain a colorless transparent solution of gold ammonium sulfite or gold sodium sulfite. The reaction formula can be written as:(1)AuCl3 +3(NH4)2SO3 + 2KOH =(NH4)3[Au(SO3)2]+ NH4Cl + 2KCl + H2O +(NH4)2SO4; (2)AuCl3 +3Na2SO3 + 2KOH = Na3[Au(SO3)2]+ NaCl + 2KCl + H2O + Na2SO4. |
| solubility in water (g/100ml) | grams dissolved per 100ml of water: 68g/20 ℃ |
| Use | nanocrystalline Superlattices in colloidal gold solutions have been prepared by ligand-induced and reduced with sodium borohydride AuCl3. |
Last Update：2024-04-10 22:29:15
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