Sodium perborate

Sodium perborate
Names
	Other names Sodium peroxoborate, PBS-1 ("monohydrate"), PBS-4 ("tetrahydrate")
Identifiers
CAS Number	7632-04-4 ; 10332-33-9 ("monohydrate") ; 10486-00-7 ("tetrahydrate") ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:30178 ;
ChemSpider	4574023 ;
ECHA InfoCard	100.035.597
EC Number	231-556-4;
PubChem CID	5460514;
RTECS number	SC7350000;
UNII	Y52BK1W96C ; Y9UKD0XE6F ("monohydrate") ; 822HSQ655R ("tetrahydrate") ;
UN number	1479
	InChI InChI=1S/B2H4O8.2Na/c3-1(4)7-9-2(5,6)10-8-1;;/h3-6H;;/q-2;2+1 Key: JBUKJLNBQDQXLI-UHFFFAOYSA-N ; InChI=1/B2H4O8.2Na/c3-1(4)7-9-2(5,6)10-8-1;;/h3-6H;;/q-2;2+1 Key: JBUKJLNBQDQXLI-UHFFFAOYAG;
	SMILES [Na+].[Na+].O[B-]1(OO[B-](O)(O)OO1)O;
Properties
Chemical formula	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)
Solubility in water	2.15 g/(100 mL) ("tetrahydrate", 18 °C)
Pharmacology
ATC code	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). verify (what is ?) Infobox references

Sodium perborate are chemical compounds with chemical formula [Na⁺]₂[B₂O₄(OH)₄]²⁻(H₂O)_x. Commonly encountered salts are the anhydrous form (x = 0) and as a hexahydrate (x = 6). These two species are sometimes called, respectively, "monohydrate" or PBS-1 and "tetrahydrate" or PBS-4, after the historic assumption that NaBO₃ would be the anhydrous form). Both the anhydrous and hexahydrate salts are white, odorless, water-soluble solids.

Peroxyborates are widely used in laundry detergents, as one of the peroxide-based bleaches.

Sodium perborate was first obtained in 1898, independently, by Sebastian Tanatar and by P. Melikoff and L. Pissadewsky; the researchers prepared sodium perborate by treating sodium borate with a solution of hydrogen peroxide and sodium hydroxide, but Tanatar also obtained sodium perborate by electrolysis of a solution of sodium borate.