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磷酸氫鈣

磷酸氫鈣
IUPAC名
Calcium hydrogen phosphate
识别
CAS号 7757-93-9  checkY
7789-77-7((dihydrate))  ☒N
PubChem 104805
ChemSpider 94606
SMILES
 
  • O.O.OP(=O)([O-])[O-].[Ca+2]
InChI
 
  • 1/Ca.H3O4P.2H2O/c;1-5(2,3)4;;/h;(H3,1,2,3,4);2*1H2/q+2;;;/p-2
InChIKey XAAHAAMILDNBPS-NUQVWONBAM
性质
化学式 CaHPO4
摩尔质量 136.06 (无水)
172.088 (二水合) g·mol⁻¹
溶解性 0.02 g/100 mL
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

磷酸氫鈣(又名磷酸二鈣)是一種化合物,通常以二水合物(其化學式為 CaHPO4 · 2H2O )的形式存在,但可經由加熱變成無水的形式。磷酸氫鈣幾乎不溶於水,在 25 °C 時的溶解度只有 0.02 g/100 mL 。

用途

[编辑]

二水合物形式的磷酸氫鈣含有大約百分之23的鈣,主要被用來做為麥片、麵粉和麵類製品的營養補充劑,亦被製為藥品賦形劑。

磷酸氫鈣常被作为动物饲料的钙磷补充。磷酸氫鈣的磷钙比例为1:1.29,与动物骨骼的磷钙比接近。在饲料级磷酸氫鈣类产品中,多数使用磷酸氫鈣于畜禽饲料。另外水产饲料中主要使用磷酸二氫鈣。

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磷酸氫鈣
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