Sodium tetrachloroaurate

Sodium tetrachloroaurate Property

storage temp. 

Inert atmosphere,Room Temperature

form 

Liquid

Appearance

Light yellow to yellow Solid

CAS DataBase Reference

15189-51-2(CAS DataBase Reference)

EPA Substance Registry System

Aurate(1-), tetrachloro-, sodium, (SP-4-1)- (15189-51-2)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26

WGK Germany 

3

F 

3-4.9

Toxicity

mouse,LD50,intraperitoneal,72mg/kg (72mg/kg),Toxicology and Applied Pharmacology. Vol. 63, Pg. 461, 1982.

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H314Causes severe skin burns and eye damage

H317May cause an allergic skin reaction

H318Causes serious eye damage

H412Harmful to aquatic life with long lasting effects

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P272Contaminated work clothing should not be allowed out of the workplace.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P310Immediately call a POISON CENTER or doctor/physician.

P321Specific treatment (see … on this label).

P330Rinse mouth.

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

P363Wash contaminated clothing before reuse.

P405Store locked up.

P501Dispose of contents/container to..…

Sodium tetrachloroaurate Chemical Properties,Usage,Production

Uses

Sodium chloroaurate, also known as "sodium chloroaurate(III)", has the chemical formula NaAuCl4·2H2O and a molecular weight of 397.80. It is an orange-yellow orthorhombic plate-like crystal. It is readily soluble in water, ethanol, and ether. It is stable in air but decomposes at 100°C. Preparation: It is obtained by reacting gold trichloride with sodium chloride using 5% hydrochloric acid as a solvent. Uses: It is used in photography, glass coloring, and pharmaceuticals.

Application

Sodium chloroaurate is used as a substitute for chloroauric acid in the determination of gold content in ores. The determination of gold content in ores typically involves dissolving the gold in aqua regia to form chloroauric acid, followed by atomic absorption spectrometry or volumetric methods. However, the stability of chloroauric acid solutions is easily affected by factors such as temperature, acidity, concentration, external conditions, and container adsorption. Alkali metals can be used to generate relatively stable chloroauric acid salts to improve the stability of chloroauric acid solutions, but this method has not been practically applied. This paper proposes a method for determining gold content in ores using sodium chloroaurate as a standard solution instead of chloroauric acid. The standard solution prepared using this method showed no low reduction after 3-4 months of storage. The method involves enriching gold using an activated carbon adsorption column, dissolving it in aqua regia, and then adding a saturated sodium chloride solution to prepare a sodium chloroaurate solution. The gold content is determined using atomic absorption spectrometry on a Hitachi Z-2000 atomic absorption spectrophotometer. Experimental results show that the determination method is reliable, has small error, and good stability; the absolute sensitivity can reach 0.025 μg/g, and the determination range is 0.04～1000 μg/g, making it suitable for the determination of gold in large batches of geological mineral samples.

Definition

ChEBI: Sodium tetrachloroaurate is a perchlorometallate salt. It contains a tetrachloroaurate(1-).