Calcium nitrite
This article needs additional citations for verification. (October 2012) |
Identifiers | |
---|---|
3D model (
JSmol ) |
|
ChemSpider | |
ECHA InfoCard
|
100.034.008 |
EC Number |
|
PubChem CID
|
|
UNII | |
CompTox Dashboard (EPA)
|
|
| |
| |
Properties | |
Ca(NO 2) 2 | |
Density | 2.26 g/cm3 |
Melting point | 390 °C (734 °F; 663 K) |
Hazards | |
GHS labelling: | |
Danger | |
H272, H301, H302, H311, H319, H340, H361, H371, H372, H373, H410 | |
P201, P202, P210, P220, P221, P260, P264, P270, P273, P280, P281, P301+P310, P301+P312, P302+P352, P305+P351+P338, P308+P313, P309+P311, P312, P314, P321, P322, P330, P337+P313, P361, P363, P370+P378, P391, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Calcium nitrite is an
Properties
At room temperature and pressure, the compound is an odorless white or light yellowish powder. It is freely
anion.Synthesis
Calcium nitrite can be produced by different synthesis processes. One is by reacting
Also, it can be prepared as detailed below, forming a solution of sodium nitrite and calcium nitrate; cooling the solution to precipitate sodium nitrate; forming a double salt of calcium nitrite/calcium hydroxide; and in the presence of water, decomposing double salt to form a solution of calcium nitrite and insolubilize calcium hydroxide. Essentially the function of calcium hydroxide is to carry calcium nitrite; calcium hydroxide forms the insolubilized double salt which can be used to separate from calcium nitrite portions from the solution. After, the double salt is dissolved liberating calcium nitrite and regenerating the calcium hydroxide.[4]
1. Precipitation of double salt
- Ca(NO
2)
2 + Ca(OH)
2 + H
2O → Ca(NO
2)
2•Ca(OH)
2•H
2O
2. Liberation of calcium nitrite
- Ca(NO
2)
2•Ca(OH)
2•H
2O--H
2O → Ca(NO
2)
2(aq) + Ca(OH)
2 + H
2O
Uses
Calcium nitrite has a great variety of uses. It can be use as
Calcium nitrite is widely used in concrete for high-rise construction, highways, bridges, railroads, airports, and large-scale
Calcium nitrite is also used as a heavy oil
Safety
It is a poisonous inorganic oxidiser, which can not be mixed with organic
See also
References
- ^ "Calcium nitrite". Retrieved 6 October 2012.
- ^ "Calcium nitrite MSDS sheet; Manufacturers". Archived from the original on 29 June 2017. Retrieved 6 October 2012.
- ^ "Calcium nitrite; a definition". Archived from the original on 17 July 2009. Retrieved 6 October 2012.
- ^ Gaidis, James M.; Arnold M. Rosenberg (23 September 1980). "Process for forming calcium nitrite". United States Patent.
- ^ a b "Calcium nitrite". Archived from the original on 14 January 2013. Retrieved 6 October 2012.
- ISSN 0002-7820.
- ^ "Nitrous acid calcium". Archived from the original on 31 January 2012. Retrieved 6 October 2012.