カルシウムビスホスフィナート 化学特性,用途語,生産方法
外観
白色, 結晶〜結晶性粉末
溶解性
水 16.7g/100g 常温。エタノールに不溶。水に溶け、エタノールに溶けない。
用途
還元剤、医薬原料。
説明
Calcium hypophosphite has the molecular formula
of Ca(H2PO2)2 and the molecular weight of
170.0631 g/mol. This salt can be prepared by the
aqueous reaction of the carbonate or oxide with H3PO2:
CaO + 2H3PO2 ? Ca(H2PO2)2
The salt is soluble in water (20 g/100 ml at 20°C) so
that the solution must be evaporated to obtain crystals.
Ca(H2PO2)2 has the CAS number of 7789-79-9 and the
density of 1.59 g/cm
3. It is composed of white square
monoclinic crystalswhich are water soluble. It is insoluble
in alcohol or ether.When heated to about 305°C, it disproportionates,
forming calcium phosphate and phosphine:
Ca(H2PO2)2 + heat ? CaHPO3 + PH3
化学的特性
white monoclinic, prismatic crystal(s) or granular powder(s); used as a corrosion inhibitor and in medicine [MER06] [HAW93]
物理的性質
Calcium hypophosphite is relatively soluble in water,
and when added to a solution of sodium hypophosphite,
forms a double salt. Crystals were obtained by
slow evaporation of the solution to form dodecahedra
with well-developed {110} faces. The crystal structure
of CaNa(H2PO2)3 belongs to the cubic system with space
group, P213, Z = 4 and a = 9.721?. The structure
consists of two kinds of octahedral groups, one with
a calcium atom and the other with a sodium atom.
Each atom of the hypophosphite ions is coordinated to
each one of the calcium and sodium atoms to form the
octahedral. This structure is, in general, typical of the
salts of hypophosphorous acid.
Calcium hypophosphite is readily available commercially
since its main usage, both industrially and in
Research, has proven to be as a source of hypophosphite
anions to form other hypophosphites.
使用
As corrosion inhibitor; in nickel plating. Pharmaceutic aid (retards oxidation of ferrous salts).
カルシウムビスホスフィナート 上流と下流の製品情報
原材料
準備製品