[[File:氧化铁1.jpg|缩略图|[http://img4.imgtn.bdimg.com/it/u=1377565149,2069547727&fm=15&gp=0.jpg 原图链接] 氧化铁 [http://b2b.gesep.com/product/detail_1027235.html 来自B2B]]]
{{Infobox film
| Name = 氧化铁
| ImageFile = Iron(III)-oxide-sample.jpg
| ImageSize = 200px
| ImageName = Sample of iron(III) oxide
| ImageFile1 = Haematite-unit-cell-3D-balls.png
| ImageSize1 = 200px
| ImageName1 = Haematite unit cell
| IUPACName = Iron(III) oxide
| IUPACNameZh = 氧化铁(III)
| OtherNames = 氧化铁 (ferric oxide)<br />[[赤铁矿]]<br />铁红<br />氧化红铁 (red iron oxide)<br />rouge<br />{{link-en|磁赤铁矿|maghemite|磁赤铁矿}} (maghemite)<br />colcothar<br />一点五氧化铁 (iron sesquioxide)<br />[[铁锈]]<br />[[赭石]]
| Section1 = {{Chembox Identifiers
| CASNo = 1309-37-1
| CASNo_Ref = {{cascite|correct|CAS}}
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}| ChemSpiderID = 14147
| UNII = 1K09F3G675
| UNII_Ref = {{fdacite|correct|FDA}}| ChEBI = 50819
| ChEBI_Ref = {{ebicite|correct|EBI}}| SMILES = O1[Fe]2O[Fe]1O2
| PubChem = 518696
| RTECS = NO7400000
| KEGG = C19424
| KEGG_Ref = {{keggcite|changed|kegg}}| InChI = 1/2Fe.3O/rFe2O3/c3-1-4-2(3)5-1
| InChIKey = JEIPFZHSYJVQDO-ZVGCCQCPAC
| StdInChI_Ref = {{stdinchicite|correct|inchi}}| StdInChI = 1S/2Fe.3O
| StdInChIKey_Ref = {{stdinchicite|correct|inchi}}| StdInChIKey = JEIPFZHSYJVQDO-UHFFFAOYSA-N
| EC_number = 215-168-2
| Gmelin = 11092
}}
| Section2 = {{Chembox Properties
| Formula = [[铁|Fe]]<sub>2</sub>[[氧|O]]<sub>3</sub>
| MolarMass = 159.69
| Appearance = 红棕色固体
| Density = 5.24
| Solubility = 不可溶
| MeltingPt = 1566 °C (1838 K) 分解
}}
| Section3 = {{Chembox Structure
| Coordination =
| CrystalStruct = [[菱方]]
}}
| Section4 = {{Chembox Thermochemistry
| DeltaHf = −825.50 kJ/mol
}}
| Section7 = {{Chembox Hazards
| EUClass = 未列明
| FlashPt = 不可燃
}}
| Section8 = {{Chembox Related
| OtherAnions = [[硫化亚铁]]
| OtherCations = [[氧化亚铁]]<br />[[四氧化三铁]]<br />[[二氧化钌]]<br />[[二氧化锇]]
}}
}}
'''氧化铁'''，或称'''三氧化二铁'''，又称烧褐铁矿、烧赭土、铁丹、铁红、红粉等，化学式Fe<sub>2</sub>O<sub>3</sub>，是[[铁锈]]和[[赤铁矿]]的主要成分。