16903-35-8 Usage
Description
Chloroauric acid, also known as hydrogen tetrachloroaurate(III), is a chemical compound with the formula HAuCl4. It appears as golden to yellowish-brown crystals or powder and possesses unique chemical properties that make it valuable in various applications.
Uses
Used in Gold Purification and Recovery:
Chloroauric acid is used as a precursor in the purification of gold through electrolysis. It plays a crucial role in the recovery, concentration, purification, and analytical determination of gold, making it an essential component in the gold industry.
Used in Catalyst Preparation:
Chloroauric acid acts as a key starting material for the preparation of gold compounds and is particularly important as a catalyst in the synthesis of 2-arylbenzoxazoles, which are valuable in the pharmaceutical and chemical industries.
Used in Alkaloid Determination:
In the field of chemistry, chloroauric acid is primarily used for alkaloid determination, a process that helps identify and quantify alkaloids in various samples.
Used in Electroplating and Gold Coating:
Chloroauric acid is utilized in the electroplating of gold, which is essential for creating a thin layer of gold on various surfaces, such as electronic connectors and integrated circuit lead frames. It is also used for local gold-plating in the semiconductor industry.
Used in Photography and Coloration:
In the photography industry, chloroauric acid is employed in the development of photographic films and prints. Additionally, it is used in the coloring of porcelain and the manufacturing of red glass, contributing to the vibrant colors and aesthetic appeal of these products.
Used in Special Inks and Tuberculosis Treatment:
Chloroauric acid finds application in the production of special inks, which are used for various purposes, including printing circuit boards. It is also used in the treatment of tuberculosis, where its antimicrobial properties help combat the disease.
Used as an Analytical Reagent:
Chloroauric acid serves as an analytical reagent, particularly in the microanalysis of rubidium (Rb) and cesium (Cs), which are essential in various scientific and industrial applications.
Chloroauric acid
Chloroalic acid is also known as "gold chloride", "gold chloride tetrahydrate". Chemical formula is HAuCl4 ? 4H2O. Molecular weight is 411.85. It is a yellow needle crystal. It is toxic and corrosive. It is easily soluble in water, and soluble in ethanol and ether, and slightly soluble in chloroform. Anhydrous chloroauric acid can be crystallized from the ethanol solution. It will decompose under heat condition, and decompose into gold trichloride at 120 ° C. Exposure of it leads to black spots. In alkaline solution, it reacts with KI to precipitate brown gold. In the acidic solution, it generates "cinnamon purple in the case of tin dichloride. Its aqueous solution was purple after dealing with methyl orange, and it turns green after 1 to 3 drops of hydrochloric acid, and then it becomes lavender after gold salt solution. We get gold hydroxide precipitation after adding cold potassium hydroxide solution. It was reduced to gold powder with sulfur dioxide.
Preparation
Dissolve the pure gold in aqua regia (or hydrochloric acid saturated by chlorine gas). After distillation and crystallization, we get the product.
Purification Methods
It is obtained as a dark red crystalline mass by dissolving Au in aqua regia and evaporating. When sublimed at 180o, the crystals are ruby red. The anhydrous salt is hygroscopic, soluble in H2O but sparingly soluble in EtOH and Et2O. Aurochloric acid is formed when AuCl3 is dissolved in HCl. [Diemer J Am Chem Soc 35 553 1913, Glemser & Sauer Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p1 056 1965.]
Check Digit Verification of cas no
The CAS Registry Mumber 16903-35-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,0 and 3 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 16903-35:
(7*1)+(6*6)+(5*9)+(4*0)+(3*3)+(2*3)+(1*5)=108
108 % 10 = 8
So 16903-35-8 is a valid CAS Registry Number.
InChI:InChI=1/Au.4ClH/h;4*1H/q+1;;;;/p-3
