SODIUM PERBORATE
Sodium perborate is manufactured by reaction of borax Na2B4O7 and sodium hydroxide NaOH to give sodium metaborate NaBO2, which is then reacted with hydrogen peroxide to give hydrated sodium perborate:
Na2B4O7 + 2 NaOH → 4 NaBO2 + H2O2
NaBO2 + 2 H2O2 → Na2B2O4(OH)4
It may also be produced in the electrolysis of an aqueous solution containing borax, sodium carbonate and sodium bicarbonate.Sodium perborate serves as a stable source of active oxygen in many detergents, laundry detergents, cleaning products, and laundry bleaches. It is a less aggressive bleach than sodium hypochlorite and other chlorine-based bleaches, causing less degradation to dyes and textiles. Sodium perborate releases oxygen rapidly at temperatures greater than 60 °C. Addition of the activator, typically tetraacetylethylenediamine (TAED), makes it active at lower temperatures (40–60 °C).
The compound has antiseptic properties and can act as a disinfectant. It is also used as a “disappearing” preservative in some brands of eye drops.
Sodium perborate is also present in some tooth bleaching formulas for non vital root treated teeth.
Additional information
| CAS | 15120-21-5 / 7632-04-4 / 11138-47-9 |
|---|---|
| Functions | ORAL CARE, OXIDISING, BLEACHING |
| Formula | NaBO3·nH2O |
| Molar Mass | 99.815 g/mol ("monohydrate"), 153.86 g/mol ("tetrahydrate") |
| Application | detergents, laundry detergents, cleaning products, and laundry bleaches |
| Restriction | II/1397, It has been automatically banned in cosmetic products in the EU, in any concentration |
| Trade names | Sodium Perborate |