Sodium percarbonate

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Sodium percarbonate
Sodium percarbonate.svg
Sodium-percarbonate-xtal-100K-2003-CM-3D-balls.png
Identifiers
CAS number 15630-89-4 YesY
PubChem 159762
ChemSpider 13399092 YesY
UNII Z7G82NV92P N
EC number 239-707-6
RTECS number FG0750000
Jmol-3D images Image 1
Properties
Molecular formula Na2CO3·1.5H2O2
Molar mass 156.982 g/mol
Appearance white solid
Solubility in water 150 g/l
Hazards
EU Index Not listed
Main hazards Irritant, Oxidizer
Flash point Non-flammable
Related compounds
Other anions Sodium carbonate
Sodium bicarbonate
Other cations Calcium percarbonate
Magnesium percarbonate
Related compounds Sodium perborate
Sodium persulfate
Sodium perphosphate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Sodium percarbonate is a chemical, an adduct of sodium carbonate and hydrogen peroxide (a perhydrate), with formula 2Na2CO3 · 3H2O2. It is a colorless, crystalline, hygroscopic and water-soluble solid.[1] It is used in some eco-friendly cleaning products and as a laboratory source of anhydrous hydrogen peroxide.

This product contains the carbonate anion, and should not be confused with sodium peroxocarbonate Na2CO4 or peroxodicarbonate Na2C2O6, which contain different anions.

Structure[edit]

At room temperature, solid sodium percarbonate has the orthorhombic crystal structure, with the Cmca crystallographic space group. The structure changes to Pbca as the crystals are cooled below about −30 °C.[2]

Production[edit]

Sodium percarbonate is produced industrially by reaction of sodium carbonate and hydrogen peroxide, followed by crystallization. Also, dry sodium carbonate may be treated directly with concentrated hydrogen peroxide solution. World production capacity of this compound was estimated at several hundred thousand tonnes for 2004.[3] It can be obtained in the laboratory by treating the two substances in aqueous solution with proper control of the pH[4] or concentrations.[2]

Uses[edit]

As an oxidizing agent, sodium percarbonate is an ingredient in a number of home and laundry cleaning products, including non-chlorine bleach products such as OxiClean, Tide laundry detergent,[1] and Vanish.[5] Dissolved in water, it yields a mixture of hydrogen peroxide (which eventually decomposes to water and oxygen) and sodium carbonate ("soda ash").[1]

2Na2CO3.3H2O2 → 2Na2CO3 + 3H2O2 [5]

Sodium percarbonate can be used in organic synthesis as a convenient source of anhydrous H2O2, in particular in solvents that cannot dissolve the carbonate but can leach the H2O2 out of it.[6]

Commercial products[edit]

References[edit]

  1. ^ a b c Craig W. Jones (1999). Applications of hydrogen peroxide and its derivatives. Royal Society of Chemistry. ISBN 0-85404-536-8. 
  2. ^ a b R. G. Pritchard and E. Islam (2003). "Sodium percarbonate between 293 and 100 K". Acta Crystallographica Section B B59 (5): 596–605. doi:10.1107/S0108768103012291. 
  3. ^ Harald Jakob, Stefan Leininger, Thomas Lehmann, Sylvia Jacobi, Sven Gutewort (2005), "Peroxo Compounds, Inorganic", Ullmann's Encyclopedia of Industrial Chemistry, Weinheim: Wiley-VCH, doi:10.1002/14356007.a19_177.pub2 
  4. ^ J. M. Adams and R. G. Pritchard (1977). "The crystal structure of sodium percarbonate: an unusual layered solid". Acta Crystallographica Section B B33 (12): 3650–3653. doi:10.1107/S0567740877011790. 
  5. ^ a b "Oxygen-based bleaches", The Royal Society of Chemistry, and Reckitt Benckiser (the manufacturers of Vanish)
  6. ^ McKillop, A (1995). "Sodium perborate and sodium percarbonate: Cheap, safe and versatile oxidising agents for organic synthesis". Tetrahedron 51 (22): 6145. doi:10.1016/0040-4020(95)00304-Q. 

External links[edit]