Editing Copper(II) nitrate (section)

==Applications==
Copper(II) nitrate finds a variety of applications, the main one being its conversion to [[copper(II) oxide]], which is used as [[catalyst]] for a variety of processes in [[organic chemistry]].  Its solutions are used in textiles and polishing agents for other metals. Copper nitrates are found in some [[pyrotechnic]]s.<ref name=Ullmann>H.Wayne Richardson "Copper Compounds" Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim.  {{doi|10.1002/14356007.a07_567}}.</ref>  It is often used in school laboratories to demonstrate chemical [[voltaic cell]] reactions. It is a component in some ceramic glazes and metal patinas.

===Organic synthesis===
Copper nitrate, in combination with [[acetic anhydride]], is an effective reagent for nitration of [[aromatic]] compounds, known as the [[Menke nitration]].<ref>{{cite journal |author=Menke J.B. |title=Nitration with nitrates |journal=Recueil des Travaux Chimiques des Pays-Bas |volume=44 |year=1925 |pages=141 |doi=10.1002/recl.19250440209}}</ref>
Hydrated copper nitrate adsorbed onto clay affords a reagent called "Claycop".  The resulting blue-colored clay is used as a slurry, for example for the oxidation of [[thiol]]s to [[disulfide]]s.  Claycop is also used to convert dithioacetals to carbonyls.<ref>Balogh, M. "Copper(II) Nitrate–K10 Bentonite Clay"  in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. {{doi|10.1002/047084289X}}.</ref>  A related reagent based on [[montmorillonite]] has proven useful for the [[nitration]] of aromatic compounds.<ref>{{cite journal |doi=10.1002/anie.199005351 |volume=29 |issue=5 |title=Clays Direct Aromatic Nitration |year=1990 |journal=Angewandte Chemie International Edition in English |pages=535–536 |last1=Collet |first1=Christine}}</ref>

=== Electrowinning ===
Copper(II) nitrate may also be used for copper [[electrowinning]] on small scale with a ammonia (NH<sub>3</sub>) as a byproduct.<ref>{{Cite journal |last=Oishi |first=Tetsuo |last2=Koyama |first2=Kazuya |last3=Konishi |first3=Hirokazu |last4=Tanaka |first4=Mikiya |last5=Lee |first5=Jae-Chun |date=November 2007 |title=Influence of ammonium salt on electrowinning of copper from ammoniacal alkaline solutions |url=https://linkinghub.elsevier.com/retrieve/pii/S001346860700802X |journal=Electrochimica Acta |language=en |volume=53 |issue=1 |pages=127–132 |doi=10.1016/j.electacta.2007.06.024|url-access=subscription }}</ref>