Cadmium oxalate
{{Chembox
| ImageFile = cadmium oxalate.png
| Section1 = {{Chembox Identifiers
| CASNo = 814-88-0
| CASNo_Ref = {{cascite|correct|CAS}}
| EC_number = 212-408-8
| ChemSpiderID = 11409843
| PubChem = 3083647
| StdInChI=1S/C2H2O4.Cd/c3-1(4)2(5)6;/h(H,3,4)(H,5,6);
| StdInChIKey = OPPBPDNPEOPGLG-UHFFFAOYSA-N
| SMILES = C(=O)(C(=O)O)O.[Cd]
}}
| Section2 = {{Chembox Properties
|Cd=1|C=2|O=4
| Appearance =
| Density = 3.32 g·cm−3 (anhydrous)
| MeltingPt = {{convert|340|C|K}} (decomposes, anhydrous)
{{convert|180|C|K}} (decomposes, dihydrate){{cite book|author=钟兴厚|display-authors=etal|title=无机化学丛书 第六卷 卤素 铜分族 锌分族|publisher=科学出版社|date=1995|page=794. 表 20.50 镉的含氧酸盐的性质|language=zh}}
| Solubility = 0.003 g (18 °C, trihydrate) }}
| Section3 = {{Chembox Hazards
| MainHazards =
| FlashPt =
| Autoignition = }}
}}
Cadmium oxalate is an inorganic compound with the chemical formula CdC2O4. It can be produced by reacting potassium oxalate and cadmium nitrate.{{cite journal|journal=Nanotechnology|volume=17|issue=20|issn=0957-4484|date=2006-10-28|pages=5271–5277|doi=10.1088/0957-4484/17/20/038|url=https://iopscience.iop.org/article/10.1088/0957-4484/17/20/038|title=Large scale synthesis of CdS nanorods and its utilization in photo-catalytic H 2 production|accessdate=2021-01-28|author=C M Janet, R P Viswanath|url-access=subscription}} Its thermal decomposition in air produces cadmium oxide,Fabbri, G.; Baraldi, P. Thermal decomposition of organic acid salts. I. Decomposition of metal oxalates in air. Atti della Societa dei Naturalisti e Matematici di Modena, 1975. 106: 57-72. ISSN: 0365-7027. while metallic cadmium will be formed instead under vacuum.David, Robert. The thermal decomposition of several metallic oxalates. Bulletin de la Societe Chimique de France, 1960. 719-736. ISSN: 0037-8968. It reacts with chalcogens in ethylenediamine to form the corresponding cadmium chalcogenide:{{cite journal|journal=Chemistry of Materials|volume=10|issue=9|language=en|issn=0897-4756|date=September 1998|pages=2309–2312|doi=10.1021/cm980181s|url=https://pubs.acs.org/doi/10.1021/cm980181s|title=A Novel Solventothermal Synthetic Route to Nanocrystalline CdE (E = S, Se, Te) and Morphological Control|accessdate=2021-01-28|author=Shu-Hong Yu, Yong-Sheng Wu, Jian Yang, Zhao-Hui Han, Yi Xie, Yi-Tai Qian, Xian-Ming Liu|archive-date=2020-12-10|archive-url=https://web.archive.org/web/20201210115144/https://pubs.acs.org/doi/10.1021/cm980181s|url-access=subscription}}