Sodium percarbonate

From Wikipedia, the free encyclopedia

  (Redirected from Sodium Percarbonate)

Jump to: navigation, search

Sodium percarbonate
IUPAC name[hide] sodium carbonate—hydrogen peroxide (2/3)
other names[hide] PCS, solid hydrogen peroxide, Sodium carbonate hydrogen peroxide, sodium carbonate peroxyhydrate
Identifiers
CAS number	15630-89-4 Y
PubChem	159762
EC number	239-707-6
Properties
Molecular formula	Na2CO3·1.5H2O2
Molar mass	157.01 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
Related compounds	Sodium perborate Sodium persulfate Sodium perphosphate
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Sodium percarbonate is a white crystalline water-soluble adduct of sodium carbonate and hydrogen peroxide, with formula Na₂CO₃·1.5H₂O₂.^[1] Despite the name, it is, in fact, a carbonate perhydrate.^[1]; it should not be confused with sodium peroxocarbonate Na₂CO₄ or peroxodicarbonate Na₂C₂O₆.

Sodium percarbonate is an oxidizing agent and ingredient in a number of home and laundry cleaning products, including eco-friendly bleach products such as OxiClean. ^[1] Dissolved in water, it releases hydrogen peroxide and soda ash (sodium carbonate):^[1]

2(Na₂CO₃·1.5H₂O₂) → 2 Na₂CO₃ + 3 H₂O₂

Sodium percarbonate can be used in organic synthesis as a convenient source of anhydrous H₂O₂, particularly in solvents that cannot dissolve the carbonate but can leach the H₂O₂ out of it.^[2]

Contents [hide] 1 Structure 2 Synthesis 3 References 4 External links

[edit] Structure

Solid sodium percarbonate is a colorless, hygroscopic, crystalline solid with the orthorhombic crystal structure. The crystallographic point group is Cmca at room temperature, but changes to Pbca as the crystals are cooled below about -30 °C. ^[3]

[edit] Synthesis

Since sodium percarbonate is easily decomposed by water, it is produced commercially by reacting powdered anhydrous Na₂CO₃ with H₂O₂ dissolved in carbon tetrachloride CCl₄.^[4] It can be obtained in the laboratory by reacting the two substances in aqueous solution with proper control of the pH^[4] or concentrations.^[3]

[edit] References

1. ^ ^{a b c d} Craig W. Jones Applications of hydrogen peroxide and its derivatives (1999) Royal Society of Chemistry ISBN 0854045368
2. ^ A. McKillop, W. R. Sanderson (2000) Sodium perborate and sodium percarbonate: further applications in organic synthesis (survey article). Journal of the Chemical Society, Perkin Transactions 1, pages 471-476. doi:10.1016/0040-4020(95)00304-Q
3. ^ ^{a b} R. G. Pritchard and E. Islam (2003). "Sodium percarbonate between 293 and 100 K". Acta Crystallographica Section B B59: 596–605. doi:10.1107/S0108768103012291. 
4. ^ ^{a b} J. M. Adams and R. G. Pritchard (1977). "The crystal structure of sodium percarbonate: an unusual layered solid". Acta Crystallographica Section B B33: 3650–3653. doi:10.1107/S0567740877011790. 

[edit] External links

• Organic Chemistry Portal: Sodium percarbonate
• Record in the Household Products Database of NLM