Perborate/peroxoborate

Sodium Peroxoborate Tetrahydrate. The compound sodium peroxoborate tetrahydrate [28962-65-4] (sodium perborate trihydrate), Na2B2(02)2[(0H)J 4H20, was formerly written as NaBO 3H20. A number of procedures have been pubHshed (13) for producing this hydrate most... 

Sodium Peroxoborate. Sodium peroxoborate [10332-33-9] (sodium perborate monohydrate), Na2[82(02)2(011)4], formerly written as NaBO H20, is known only as a microcrystalline powder, made by dehydrating the hexahydrate. The crystal stmcture has not been deterrnined, but the vibrational spectmm (27) indicates the presence of the same cycHc peroxodiborate anion (4) as that in the hexahydrate as well as in the tetrahydrate. 

The only significant peroxoborate species present in dilute solution is the [(HOlsBOOHj anion (Fig. 22). Peroxoborate salts, commonly referred to as perborates, can be selectively crystallized from solution as various alkali and... 

Sodium Peroxoborate. Sodium peroxoborate (sodium perborate mono-hydrate), Na2[B2(02)2(OH) ], formerly written as NaB03 > H20, is known only as a microcrystalline powder, made by dehydrating the hexahydrate. 

Perborates, or peroxoborates, are usually written as if the perborate anion were BO3. The three known sodium perborates are therefore conunonly referred to as the mono-, tri-, and tetrahydrates, NaB03 H20, where n = 1, 3, and 4. However, these actually contain the cyclic dianion (8). On the basis of this structure, these compounds are more correctly referred to as anhydrous, tetrahydrate, and hexahydrate. 

HOO oxidizes bleachable soils and stains. The most used source of hydrogen peroxide is sodium perborate, known as sodium peroxoborate tetrahydrate, NaB03-4H20, that in crystalline form contains the per-oxodiborate anion [4, 17]. 

Sodium perborate (more correctly sodium peroxoborate) (NaB02(0H)2 3 H2O)... 

The first step, the formation of sodium metaborate from borax and sodium hydroxide, is carried out at temperatures up to 90°C. When impure borax is used the solution is filtered. The second step is carried out at 25 °C and the mixture subsequently cooled to 15°C and the precipitated sodium peroxoborate hexahydrate filtered off. Stabilizers for the perborate, such as silicates or magnesium salts, may be added to the reaction mixture. Residual moisture (3 to 10%) is removed in a hot air drier. The mother liquor from the second step can be returned to the first step. 

The hydrogen peroxide is provided by sodium perborate, which exists as peroxoborate in crystalline state. 

The reactions of B(OH)3 with Na202, or borates with H2O2, yield sodium peroxoborate (commonly known as sodium perborate). This is an important constituent of... 

CAS 7632-04-4 EINECS/ELINCS 231-556-4 Synonyms Boric acid, sodium salt Perboric acid, sodium salt Sodium perborate anhydrous Sodium perborate monohydrate Sodium peroxoborate Sodium peroxometaborate Sodium peroxyborate... 

Sodium peroxoborate Sodium peroxometaborate Sodium peroxyborate. See Sodium perborate... 

When dissolved in water, perborate and percarbonate generate hydrogen peroxide. Although peroxoborates [62] and peroxocarbonates [63] are analytically detectable in such solutions, under normal usage conditions both persalts deliver comparable bleaching results. 

The sodium perborate oxidation of morpholine and A-methylmorpholine is first order in the oxidant and substrates peroxoborate anion acts as the oxidizing species... 

Dissolution of perborate in the wash bath principally delivers the perhydroxide anion, although peroxoborate species will also be present. The level of the latter depends on the pH of the wash bath and the concentration of persalt used [9-11]. These species may also take part in the bleaching process. 

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