Silver dichromate

Structural formula
General
Surname	Silver dichromate
other names	Silver dichromate
Molecular formula	Ag 2 Cr 2 O 7
Brief description	dark red solid
External identifiers / databases
EC number	232-044-3
ECHA InfoCard	100.029.131
PubChem	9932493
Wikidata	Q3916638
properties
Molar mass	431.72 g mol −1
Physical state	firmly
density	4.77 g cm −3
solubility	practically insoluble in water (83 mg l −1 at 15 ° C); soluble in ammonium nitrate and nitric acid;
safety instructions
H and P phrases	H: 317-410-350i
	P: ?
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Silver dichromate is an inorganic chemical compound of silver from the dichromate group .

Extraction and presentation

Silver dichromate can be obtained by reacting silver nitrate with potassium dichromate .

{\ displaystyle {\ ce {2 AgNO3 + K2Cr2O7 -> Ag_2Cr_2O_7 + 2 KNO3}}}

This type of synthesis can be used in gel to form Liesegang's rings .

Syntheses based on silver salicylate are also known.

properties

Silver dichromate is a dark red, non-light-sensitive solid that is practically insoluble in water. The compound decomposes when heated and in hot water.

use

Silver dichromate is formed when silver is detected by potassium dichromate. It can also be used in copier papers.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 366 ( limited preview in Google Book search).
↑ Template: CL Inventory / harmonized Harmonized classification and labeling of chromium (VI) compounds, with the exception of barium chromate and compounds that are listed separately in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 11, 2019.
↑ Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry Chromium (VI) compounds, with the exception of barium chromate and compounds that are listed separately in this appendix in Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 11, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .
↑ ^a ^b Bartosz A. Grzybowski: Chemistry in Motion Reaction-Diffusion Systems for Micro- and Nanotechnology . John Wiley & Sons, 2009, ISBN 0-470-74163-5 , pp. 152 ( limited preview in Google Book search).
↑ F. Soofivand, F. Mohandes, M. Salavati-Niasari: Simple and facile synthesis of Ag ₂ CrO ₄ and Ag ₂ Cr ₂ O ₇ micro / nanostructures using a silver precursor. In: Micro & Nano Letters. 7, 2012, p. 283, doi : 10.1049 / mnl.2012.0042 .
↑ Faezeh Soofivand, Fatemeh Mohandes, Masoud Salavati-Niasari: Silver chromate and silver dichromate nanostructures: Sonochemical synthesis, characterization, and photocatalytic properties. In: Materials Research Bulletin. 48, 2013, p. 2084, doi : 10.1016 / j.materresbull.2013.02.025 .
^ ^A ^b Eduard Valenta: Photographic chemistry and chemical science . BoD - Books on Demand, 2012, ISBN 978-3-86444-634-4 , pp. 155 ( limited preview in Google Book search).
^ Christopher G. Morris, Academic Press: Academic Press Dictionary of Science and Technology . Gulf Professional Publishing, 1992, ISBN 0-12-200400-0 , pp. 1991 ( limited preview in Google Book Search).
↑ Hans Bode: elements of the first sub-group copper · silver · gold . Springer-Verlag, 2013, ISBN 978-3-662-30624-6 , pp. 86 ( limited preview in Google Book search).

[Dale_L._Perry-1] ↑ ^a ^b ^c ^d ^e ^f Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 366 ( limited preview in Google Book search).

[2] Template: CL Inventory / harmonized Harmonized classification and labeling of chromium (VI) compounds, with the exception of barium chromate and compounds that are listed separately in this appendix in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 11, 2019.

[CLP_100.240.768-3] Not explicitly listed in Regulation (EC) No. 1272/2008 (CLP) , but with the specified labeling it falls under the group entry Chromium (VI) compounds, with the exception of barium chromate and compounds that are listed separately in this appendix in Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on June 11, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[Bartosz_A._Grzybowski-4] Bartosz A. Grzybowski: Chemistry in Motion Reaction-Diffusion Systems for Micro- and Nanotechnology . John Wiley & Sons, 2009, ISBN 0-470-74163-5 , pp. 152 ( limited preview in Google Book search).

[DOI10.1049/mnl.2012.0042-5] F. Soofivand, F. Mohandes, M. Salavati-Niasari: Simple and facile synthesis of Ag ₂ CrO ₄ and Ag ₂ Cr ₂ O ₇ micro / nanostructures using a silver precursor. In: Micro & Nano Letters. 7, 2012, p. 283, doi : 10.1049 / mnl.2012.0042 .

[DOI10.1016/j.materresbull.2013.02.025-6] Faezeh Soofivand, Fatemeh Mohandes, Masoud Salavati-Niasari: Silver chromate and silver dichromate nanostructures: Sonochemical synthesis, characterization, and photocatalytic properties. In: Materials Research Bulletin. 48, 2013, p. 2084, doi : 10.1016 / j.materresbull.2013.02.025 .

[Eduard_Valenta-7] A ^b Eduard Valenta: Photographic chemistry and chemical science . BoD - Books on Demand, 2012, ISBN 978-3-86444-634-4 , pp. 155 ( limited preview in Google Book search).

[Christopher_G._Morris,_Academic_Press-8] Christopher G. Morris, Academic Press: Academic Press Dictionary of Science and Technology . Gulf Professional Publishing, 1992, ISBN 0-12-200400-0 , pp. 1991 ( limited preview in Google Book Search).

[Hans_Bode-9] Hans Bode: elements of the first sub-group copper · silver · gold . Springer-Verlag, 2013, ISBN 978-3-662-30624-6 , pp. 86 ( limited preview in Google Book search).