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Sodium bicarbonate

Name Sodium hydrogen carbonate
Chemical formula NaHCO3
Appearance White solid
Formula weight 84.0 amu
Melting point Decomposes at 543 K (270 °C)
Density 2.2 ×103 kg/m3
Crystal structure ?
Solubility 10.3 g in 100g water
ΔfH0solid -951 kJ/mol
S0solid 102 J/mol·K
Ingestion Safe except in very large quantities.
Inhalation May cause irritation.
Skin May cause irritation.
Eyes May cause pain and redness
More info Hazardous Chemical Database (http://ull.chemistry.uakron.edu/erd/chemicals/10/9917)
SI units were used where possible. Unless otherwise stated, standard conditions were used.

Disclaimer and references

Sodium bicarbonate (NaHCO3), or sodium hydrogen carbonate, also known as baking soda, is a soluble white anhydrous[?] or crystalline compound, with a slight alkaline taste resembling that of sodium carbonate. It is found in many mineral springs and also produced artificially.

It is also used as an antacid to treat acid indigestion[?] and heartburn. The anhydrous form is also used to absorb moisture and odours—a box can be left in the refrigerator for this purpose.

Sodium bicarbonate, when exposed to a moderately strong acid, releases carbon dioxide:

It is used in combination with acidic compounds as a leavening agent in baking: some forms of baking powder contain sodium bicarbonate. Formerly, it was used as a source of carbon dioxide for soda water.

See also: baking powder, sodium carbonate, list of minerals

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