Nomenclature
CAS number: 144-55-8
Carbonic acid sodium salt (1:1); sodium hydrogen carbonate; sodium acid carbonate; baking soda.
CHNaO
3; mol wt 84.01.
C 14.30%, H 1.20%, Na 27.37%, O 57.13%.
NaHCO
3.
Description and references
The bicarbonate of commerce is about 99.8%
pure. Prepd from sodium carbonate, water and carbon dioxide. Manuf:
Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York,
4th ed., 1975) pp 702-705.
Properties
White cryst powder or granules. Begins to lose
CO2 at about 50° and at 100° it is converted into Na2CO3. Readily dec by weak acids. In aq soln it
begins to break up into carbon dioxide and sodium carbonate at about
20° and completely on boiling. Sol in 10 parts water at 25°, in 12
parts water at about 18°. Insol in alcohol. Its aq soln prepd with
cold water and without agitation is only slightly alkaline to litmus
or phenolphthalein; on standing or rise in temp the alkalinity increases.
pH of freshly prepd 0.1 molar aq soln at 25°: 8.3.Use
Manuf many sodium salts; source of CO
2; ingredient of baking powder, effervescent salts and beverages;
in fire extinguishers, cleaning compds. In buffers; in analytical
chemistry for pH adjustment.
Therapeutic Category
Antacid; systemic alkalinizing agent.
Therapeutic Category (Veterinary)
Systemic and urinary alkalinizing agent.
Keywords
Antacid; Alkalinizing Agent