| IUPAC name
| Other names
|Molar mass||238.9792 g/mol|
|Appearance||White hygroscopic solid|
|Melting point||416–417 °C (781–783 °F; 689–690 K) |
|188 g/100 ml (20 °C)|
|Solubility|| Slightly soluble in acetone, alcohols, ethyl acetate|
Almost insoluble in diethyl ether, glycerol
|Solubility in acetone||3.82 g/100 g (25 °C)|
|Solubility in butanol||5.32 g/100 g (25 °C)|
|Solubility in diethyl ether||0.26 g/100 g (25 °C)|
|Solubility in ethanol||6.24 g/100 g (25 °C)|
|Solubility in ethyl acetate||4.306 g/100 g (25 °C)|
|Vapor pressure||~0 mmHg|
Std enthalpy of
|Safety data sheet||Sigma-Aldrich (tetrahydrate)|
| Calcium hypochlorite|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Calcium perchlorate is a chemical compound, a perchlorate salt with the molecular formula Ca(ClO4)2. It is commonly encountered as tetrahydrate.
- Ca(ClO4)2 + H2SO4 → CaSO4 + 2 HClO4
If concentrated (98%) sulfuric acid is used, one could prepare anhydrous perchloric acid, though this is very dangerous, since concentrated perchloric acid may explode in contact with organic substances.
Calcium perchlorate is somewhat difficult to purchase from suppliers, being a perchlorate.
In the EU, the sale of perchlorates is regulated, however, per directive level, only sodium and potassium perchlorate are restricted, meaning that unless the member country restricts other perchlorates, calcium perchlorate should not normally be restricted.
- 2 NaClO4 + CaCl2 → Ca(ClO4)2 + 2 NaCl
Calcium perchlorate is less soluble than sodium chloride and will crystallize from solution. Cooling the solution increases yield.
- Make concentrated perchloric acid
Calcium perchlorate is a strong oxidizer, but its hygroscopicity makes it less powerful. It is toxic if consumed.
Calcium perchlorate should be kept in closed and sealed bottles, away from any organic material or strong mineral acid.
- Willard; Smith; Journal of the American Chemical Society; vol. 45; (1923); p. 293
- Migdal-Mikuli, Anna; Hetmanczyk, Joanna; Journal of Thermal Analysis and Calorimetry; vol. 91; nb. 2; (2008); p. 529 - 534
- Perchlorate in the Environment (2000), Edward Todd Urbansky, pag. 106