Sodium perborate

Sodium perborate is chemical compound whose chemical formula may be written NaH2BO4, Na2H4B2O8, or, more properly, [Na+]2[B2O4(OH)4]2−. Its name is sometimes abbreviated as PBS (not to be confused with phosphate-buffered saline).

Sodium perborate
Names
Other names
Sodium peroxoborate, PBS-1 ("monohydrate"), PBS-4 ("tetrahydrate")
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.035.597
EC Number
  • 231-556-4
RTECS number
  • SC7350000
UNII
UN number 1479
  • InChI=1S/B2H4O8.2Na/c3-1(4)7-9-2(5,6)10-8-1;;/h3-6H;;/q-2;2*+1 Y
    Key: JBUKJLNBQDQXLI-UHFFFAOYSA-N Y
  • InChI=1/B2H4O8.2Na/c3-1(4)7-9-2(5,6)10-8-1;;/h3-6H;;/q-2;2*+1
    Key: JBUKJLNBQDQXLI-UHFFFAOYAG
  • [Na+].[Na+].O[B-]1(OO[B-](O)(O)OO1)O
Properties
NaBO3·nH2O
Molar mass 99.815 g/mol ("monohydrate");
153.86 g/mol ("tetrahydrate")
Appearance White powder
Odor Odorless
Melting point 63 °C (145 °F; 336 K) ("tetrahydrate")
Boiling point 130 to 150 °C (266 to 302 °F; 403 to 423 K) ("tetrahydrate", decomposes)
2.15 g/(100 mL) ("tetrahydrate", 18 °C)
Pharmacology
A01AB19 (WHO)
Hazards
NFPA 704 (fire diamond)
1
1
0
Flash point Non-flammable
Safety data sheet (SDS) ICSC 1046
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

The compound is commonly encountered in anhydrous form or as a hexahydrate (commonly called "monohydrate" or PBS-1 and "tetrahydrate" or PBS-4, after the early assumption that NaBO3 would be the anhydrous form). They are both white, odorless, water-soluble solids.

This salt is widely used in laundry detergents, as one of the peroxide-based bleaches.

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