Copper is a chemical element with the symbol Cu (from Latin: cuprum) and the atomic number of 29. It is easily recognisable, due to its distinct red-orange color. Copper also has a range of different organic and inorganic salts, having varying oxidation states ranging from (0,I) to (III). These salts (mostly the (II) salts) are often blue to green in color, rather than the orange color copper is known for. Despite being considered a semi-noble metal, copper is one of the most common salt-forming transition metals, along with iron.

Name	Chemical Formula	Anion	Image
Copper(I) oxide	Cu2O	Oxide (oxygen)
Copper(I) chloride	CuCl	Chloride (hydrochloric acid)
Copper(I) iodide	CuI	Iodide (hydroiodic acid)
Copper(I) cyanide	CuCN	Cyanide (hydrocyanic acid)
Copper(I) thiocyanate	CuSCN	Thiocyanate (thiocyanic acid)
Copper(I) sulfate	Cu2SO4	Sulfate (sulfuric acid)
Copper(I) sulfide	Cu2S	Sulfide (hydrogen sulfide)
Copper(I) acetylide	Cu2C2	Acetylide (acetylene)
Copper(I) bromide	CuBr	Bromide (hydrobromic acid)
Copper(I) fluoride	CuF	Fluoride (hydrofluoric acid)
Copper(I) hydroxide	CuOH	Hydroxide (water)
Copper(I) hydride	CuH	Hydride (hydrogen gas)
Copper(I) nitrate	CuNO3	Nitrate (nitric acid)
Copper(I) phosphide	Cu3P	Phosphide (phosphine)
Copper(I) thiophene-2-carboxylate	C5H3CuO2S	thiophene-2-carboxylate (thiophene-2-carboxylic acid)
Copper(I) t-butoxide	C16H36Cu4O4	t-butoxide (t-butyl alcohol)

Name	Chemical Formula	Anion	Image
Copper(II) sulfate	CuSO4	Sulfate (sulfuric acid)
Copper(II) chloride	CuCl2	Chloride (hydrochloric acid)
Copper(II) hydroxide	Cu(OH)2	Hydroxide (water)
Copper(II) nitrate	Cu(NO3)2	Nitrate (nitric acid)
Copper(II) oxide	CuO	Oxide (oxygen)
Copper(II) acetate	Cu(OAc)2	Acetate (acetic acid)
Copper(II) fluoride	CuF2	Fluoride (hydrofluoric acid)
Copper(II) bromide	CuBr2	Bromide (bromine)
Copper(II) carbonate	CuCO3	Carbonate (carbonic acid)
Copper(II) carbonate hydroxide	Cu2CO3(OH)2	Hydroxide (water) Carbonate (carbonic acid)
Copper(II) chlorate	Cu(ClO3)2	Chlorate (chloric acid)
Copper(II) arsenate	Cu3(AsO4)2	Arsenate (arsenic acid)
Copper(II) azide	Cu(N3)2	Azide (hydrazoic acid)
Copper(II) acetylacetonate	Cu(O2C5H7)2	Acetylacetonate (acetylacetone)
Copper(II) aspirinate	C36H28Cu2O16	Acetylsalicylate (acetylsalicylic acid)
Copper(II) cyanurate	CuC3HN3O3	Cyanurate (cyanuric acid)
Copper(II) glycinate	Cu(H2NCH2CO2)2	Glycinate (glycine)
Copper(II) phosphate	Cu3(PO4)2	Phosphate (phosphoric acid)
Copper(II) perchlorate	Cu(ClO4)2	Perchlorate (perchloric acid)
Copper(II) selenite	CuSeO3	Selenite (selenous acid)
Copper(II) sulfide	CuS	Sulfide (hydrogen sulfide)
Copper(II) thiocyanate	Cu(SCN)2	Thiocyanate (thiocyanic acid)
Copper(II) triflate	Cu(OSO2CF3)2	Triflate (triflic acid)
Copper(II) tetrafluoroborate	Cu(BF4)2	Tetrafluoroborate (tetrafluoroboric acid)
Copper(II) acetate triarsenite (Paris Green)	Cu(C2H3O2)2·3Cu(AsO2)2	Acetate (acetic acid) Triarsenite (1,3,5,2,4,6-Trioxatriarsinane-2,4,6-triol)
Copper(II) benzoate	Cu(C6H5CO2)2	Benzoate (benzoic acid)
Copper(II) arsenite (Scheele's Green)	CuHAsO3	Arsenite (Arsenous acid)
Copper(II) chromite	Cu2Cr2O5	Chromite (chromic acid)
Copper(II) gluconate	C12H22CuO14	Gluconate (gluconic acid)
Copper(II) peroxide	CuO2	Peroxide (hydrogen peroxide)
Copper(II) usnate	C18H14CuO7	Usnate (usnic acid)
Copper(II) oxychloride	Cu2(OH)3Cl	Hydroxide and chloride
Copper(II) naproxen	C28H26CuO6	naproxen
Copper(II) ibuprofenate	C52H68Cu2O8	Ibuprofenate (ibuprofen)

Name	Chemical Formula	Anion	Image
copper(I,II) sulfite dihydrate (Chevreul's salt)	Cu3(SO3)2·2H2O	Sulfite (Sulfurous acid)

• List of organic salts
• List of inorganic compounds