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焦磷酸钙

焦磷酸钙
IUPAC名
Calcium diphosphate
英文名 Calcium pyrophosphate
识别
CAS号 7790-76-3  checkY
PubChem 24632
ChemSpider 23034
SMILES
 
  • [Ca+2].[Ca+2].[O-]P([O-])(=O)OP([O-])([O-])=O
InChI
 
  • 1/2Ca.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+2;/p-4
InChIKey JUNWLZAGQLJVLR-XBHQNQODAN
ChEBI 32598
MeSH Calcium+pyrophosphate
性质
化学式 Ca2O7P2
摩尔质量 254.053 g·mol⁻¹
密度 3.09 g/cm3
熔点 1230 °C
溶解性 不溶于水
危险性
欧盟编号 未列出
NFPA 704
0
2
0
 
闪点 不可燃
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

焦磷酸钙,化学式Ca2P2O7

性质

焦磷酸钙是一种白色粉末,不溶于水和,溶于稀盐酸硝酸,水悬浮液呈酸性。根据温度不同,可有三种不同的晶型:α型(1210 °C)、β型(750~900 °C)和γ型(530~750 °C)。[1]

制备

1、由磷酸氢钙在高温下进行煅烧脱水再经粉碎制得。[1]

2、焦磷酸钠氯化钙溶液在90 °C发生复分解,生成无水焦磷酸钙。经水洗、离心脱水、水洗、干燥、煅烧和粉碎,制得焦磷酸钙成品。[1]

用途

焦磷酸钙用作牙膏磨料、涂料填料、电材萤光体。也在食品工业中用作缓冲剂、中和剂、营养增补剂和酵母养料。[1]

参见

参考资料

  1. ^ 1.0 1.1 1.2 1.3 中国化工产品大全 上卷,Bc281 焦磷酸钙,页255
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焦磷酸钙
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