Ammonium tetrachloroaurate (III)

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Structural formula
Ammonium ion Tetrachloroaurate ion
General
Surname Ammonium tetrachloroaurate (III)
Molecular formula NH 4 [AuCl 4 ]
Brief description

odorless, yellow-orange crystalline powder

External identifiers / databases
CAS number 13874-04-9
EC number 680-381-3
ECHA InfoCard 100.205.444
ChemSpider 10773247
Wikidata Q15628093
properties
Molar mass 356.82 g mol −1
Physical state

firmly

Melting point

520 ° C

solubility

soluble in water and ethanol

safety instructions
GHS labeling of hazardous substances

hydrate

05 - Corrosive 06 - Toxic or very toxic

danger

H and P phrases H: 290-301-314-412
P: 260-301 + 310-303 + 361 + 353-305 + 351 + 338
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Ammonium tetrachloroaurate , NH 4 [AuCl 4 ] is a chemical compound between ammonium and tetrachloroauric acid .

Extraction and presentation

Ammonium tetrachloroaurate can be obtained by reacting a saturated solution of gold (III) chloride with ammonium chloride in hydrochloric acid .

properties

Ammonium tetrachloroaurate is an odorless, yellow-orange crystalline powder. It is soluble in water. The hydrate has a monoclinic crystal structure with the space group C 2 / c (space group no. 15) . Template: room group / 15

use

Ammonium tetrachloroaurate can be used to produce gold nanoparticles.

safety instructions

The compound can cause burns to the skin and serious eye damage. If swallowed, it is toxic as it perforates the esophagus and stomach .

When the substance is burned, nitrogen oxides , hydrogen chloride and gold oxides are released. Strong bases and oxidizing agents can cause violent reactions with ammonium tetrachloroaurate.

Individual evidence

  1. ↑ a b c d e f g data sheet Ammonium tetrachloroaurate (III) hydrate from AlfaAesar, accessed on February 8, 2019 ( PDF )(JavaScript required) .
  2. ↑ Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 493 ( limited preview in Google Book search).
  3. ↑ William Ganzenmuüller, Hermann Gedschold, Alfons Kotowski, Leopold Gmelin: Gold delivery 3 . Springer-Verlag, 2013, ISBN 978-3-662-12700-1 ( limited preview in Google book search).
  4. ↑ M. Bonamico, G. Dessy, C. Furlani, FM Capece: The crystal and molecular structure of ammonium tetrachloroaurate (III) 2/3 hydrate. In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 29, p. 1737, doi : 10.1107 / S0567740873005418 .
  5. ↑ Meghan Evans, Francesco Di Maggio, Chris Blackman, Gopinathan Sankar: AACVD synthesis of catalytic gold nanoparticle-modified cerium (IV) oxide thin films. In: physica status solidi. 12, 2015, p. 996, doi : 10.1002 / pssc.201510055 .