硫酸四氨合銅

{{chembox
| verifiedrevid = 447611336
| ImageFile1 = CuN4aq.png
| ImageName1 = Ball-and-stick model of the Tetraamminecopper(II) cation
| ImageFile2 = Copper tetrammine sulfate.jpg
| IUPACName = Tetraamminecopper(II) sulfate monohydrate
| OtherNames = cuprammonium(II) sulfate; cupric sulfate, ammoniated
| Section1 =
| Section2 = {{Chembox Properties
| Formula = [Cu(NH3)4(H2O)n]SO4
| MolarMass = 227.735（无水）245.751（一水）
| Appearance = 深藍紫色的溶液或晶體
| Density = 1.81 g/cm3
| MeltingPt =
| BoilingPt =
| Solubility = 18.5 g/100 g (21.5 °C)。

固態的硫酸四氨合铜含有[Cu(NH3)4H2O]2+離子，其分子结构為四方錐形，Cu-N及Cu-O距離約為210及233pm。

腐蝕
當黃銅及銅合金受到氨腐蝕時，會出現深藍色的四氨合銅配合物，後續會產生材料的龜裂。此問題首次發現是因為彈殼儲存場所附近有量的動物糞便。這種腐蝕現象稱為季裂。

參考資料
外部連結
*[https://web.archive.org/web/20080302034606/http://www.npi.gov.au/database/substance-info/profiles/27.html National Pollutant Inventory - Copper and compounds fact sheet]
*[https://secure.strem.com/catalog/printer.php?type=msds&catalog_number=29-6600 Material Safety Data Sheet (MSDS)]