CALCIUM PHOSPHITE

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Products Intro: Product Name:CALCIUM PHOSPHITE
CAS:21056-98-4
Purity:0.99 Package:5KG;1KG
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Products Intro: CAS:21056-98-4
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CALCIUM PHOSPHITE Basic information
Product Name:CALCIUM PHOSPHITE
Synonyms:calcium hydrogen phosphonate;Phosphonic acid calcium salt;CALCIUM PHOSPHITE;CALCIUM PHOSPHITE MONOHYDRATE
CAS:21056-98-4
MF:CaHO3P
MW:120.06
EINECS:2441821
Product Categories:
Mol File:21056-98-4.mol
CALCIUM PHOSPHITE Structure
CALCIUM PHOSPHITE Chemical Properties
Water Solubility slightly soluble H2O; insoluble alcohol [MER06]
EPA Substance Registry SystemPhosphonic acid, calcium salt (1:1) (21056-98-4)
Safety Information
MSDS Information
CALCIUM PHOSPHITE Usage And Synthesis
DescriptionCalcium phosphite can have the molecular formula of CaHPO3 or Ca(H2PO3)2. It is the former that appears when a solution of phosphorous acid is reacted with the oxide, hydroxide or carbonate:
CaO +H3PO3 ? CaHPO3·H2O +H2O
The product is a monohydrate. It can also be prepared by the action of ammonium phosphite on calcium chloride:
CaCl2 (aq) +NH4HPO3 (aq) ? CaHPO3·H2O +NH4Cl2 (aq)
A white, crystalline powder is obtained. The solubility of CaHPO3·H2O has apparently not been determined exactly. If heated to about 250°C, the anhydrate results. This is stable when heated further up to about 320°C where it decomposes to form phosphine and hydrogen:
3CaHPO3 + heat ? 2PH3 + 3Ca(PO3)2 +H2
Chemical Propertiescrystal(s); used in fertilizers and polymerization catalysts [MER06]
Physical propertiesCalcium Phosphite is a colorless, monoclinic crystal which loses water at about 150°C and is slightly soluble in water but insoluble in alcohol. The anhydrate, calcium phosphite (CaHPO3), is stable in air even when heated at 95°C for 2 months.
CALCIUM PHOSPHITE Preparation Products And Raw materials
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