Calcium gluconate

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Calcium gluconate
Names
IUPAC name
Calcium (2R,3S,4R,5R)- 2,3,4,5,6-pentahydroxyhexanoate
Other names
Calciofon
Calcium D-gluconate
Calglucon
E578
Glucobiogen
Properties
C12H22O14Ca
Molar mass 430.372 g/mol
Appearance White solid
Odor Odorless
Melting point 178 °C (352 °F; 451 K) (decomposes)[1]
Boiling point Decomposes
3.5 g/100 ml (25 °C)
Solubility Insoluble in glacial acetic acid, diethyl ether
Vapor pressure ~0 mmHg
Hazards
Safety data sheet Sigma-Aldrich (monohydrate)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Calcium gluconate is a calcium salt of gluconic acid. Among chemists, it is best known as an antidote for hydrofluoric acid exposure.

Properties

Physical

White powder, moderately soluble in cold water, readily soluble in hot water. It melts with decomposition around 178 °C, though some sources claim 120 °C.

Chemical

Heating causes calcium gluconate to decompose, liberating a large amount of carbon. This makes it a good candidate for a "Pharaoh's Serpent" experiment.

Availability and Uses

In some countries, such as the former Soviet bloc, calcium gluconate is available very cheaply in any drugstore in form of tablets or solutions. Tableted calcium gluconate, if it happens to be adulterated with chalk or something, can easily be purified by recrystallization through hot water. In other countries, a Russian pharmacy is a good place to start looking for it.

Its main medical use is as a calcium supplement. Chemists use it as an antidote for hydrofluoric acid poisoning, in forms of topical creamy gel or injections.

A calcium gluconate solution can be purchased from some farm and veterinary supplies, where it is intended for the treatment of milk fever. [2]

Projects

  • Pharaoh's Snake
  • Protect yourself while experimenting with hydrofluoric acid

Handling

Safety

Calcium gluconate is harmless. The medical grade salt is even safely edible as a dietary supplement.

Storage

Dry calcium gluconate or a solution thereof can be stored in any container under normal conditions.

Disposal

Calcium gluconate can be disposed of into the ground or drain safely.

References

  1. Nilkantum; J.Sci.Technol.India; vol. 2; (1936); p. 39; Chem.Abstr.; (1938); p. 1403
  2. http://www.pbsanimalhealth.com/details/Calcium-Gluconate-23%25-Solution/13-86.html

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