查看“︁三聚磷酸钾”︁的源代码

{{Chembox
|CustomizedImage=[[File:5.svg|x35px|5]] [[File:K+.svg|x35px|Kaliumion]] [[File:Triphosphat-Ion.svg|220px|Triphosphation]]
|OtherNames=三磷酸钾
|Section1={{Chembox Identifiers
| CASNo= 13845-36-8
|CASNo_Comment=无水
|CASNo2=66904-52-7
|CASNo2_Comment=二水
| PubChem          = 61695
|SMILES=[K+].[K+].[K+].[K+].[K+].[O-]P(=O)([O-])OP(=O)([O-])OP(=O)([O-])O[O-]
}}
|Section2={{Chembox Properties
| Appearance=白色易潮解固体<ref name="FAO">{{Internetquelle |url=http://www.fao.org/ag/agn/jecfa-additives/specs/Monograph1/Additive-307.pdf |titel=Pentapotassium triphosphate |hrsg=[[FAO]] |format=PDF; 129&nbsp;kB |sprache=en |abruf=2017-12-04 }} {{Wayback|url=http://www.fao.org/ag/agn/jecfa-additives/specs/Monograph1/Additive-307.pdf |date=20130810141912 }}</ref>
|K=5|P=3|O=10
|Density=
|MeltingPt=
|BoilingPt=
| Solubility= 2000 g·l<sup>−1</sup>当20 °C<ref name="Ullmann" /><ref name="FAO" />
}}
|Section8={{Chembox Related
|OtherAnions=[[磷酸钾]]<br />[[焦磷酸钾]]
|OtherCations=[[三聚磷酸]]<br />[[三聚磷酸钠]]
}}
}}

'''三聚磷酸钾'''是一种[[无机化合物]]，化学式 K<sub>5</sub>P<sub>3</sub>O<sub>10</sub>。

== 制备 ==
三聚磷酸钾可以由[[磷酸一氢钾]]和[[磷酸二氢钾]]反应而成。<ref name="Arthur D. F. Toy">{{cite book|author=Arthur D. F. Toy |title=The Chemistry of Phosphorus Pergamon Texts in Inorganic Chemistry |publisher=Elsevier |date=2016 |ISBN=978-1-4831-3959-3 |page=518 }}</ref>
:<math>\mathrm{2 \ K_2HPO_4 + KH_2PO_4 \longrightarrow K_5P_3O_{10} + 2 \ H_2O}</math>

== 性质==
三聚磷酸钾是白色无臭固体，极易溶于水。<ref name="FAO" />它的无水物极易[[潮解]]，1% 水溶液的[[pH值]]为9.9。<ref name="Ullmann">{{cite book|author= |title=Ullmanns Encyklopädie der technischen Chemie |publisher=Wiley, 1979 |date=1979 |ISBN=3-527-20018-5 |page=332 }}</ref>除了无水物以外，三聚磷酸钾还有二水合物和四水合物。<ref name="D. E. C. Corbridge">{{cite book|author=D. E. C. Corbridge |title=Phosphorus 2000: chemistry, biochemistry & technology |year=1990 |url=https://archive.org/details/phosphorusoutlin0010corb |publisher=Elsevier, 2000 |ISBN= |page=[https://archive.org/details/phosphorusoutlin0010corb/page/208 208] }}</ref>三聚磷酸钾在 915 K下分解。<ref name="A. Durif">{{cite book|author=A. Durif |title=Crystal Chemistry of Condensed Phosphates |publisher=Springer Science & Business Media |date=2013 |ISBN=978-1-4757-9894-4 |page=81 }}</ref>

== 用处==
三聚磷酸钾和[[三聚磷酸钠]]一样可以用作[[食品添加剂]]，E编号 E451。

== 参考资料==
<references />
{{钾化合物}}

[[Category:钾化合物]]
[[Category:磷酸盐]]