CAS number : 7632-04-4
Molecular Weight: 153.9
Chemical Formula: NaBH2O4, 3H2O
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Sodium perborate (PBS) is a white, odorless, water-soluble chemical compound with the chemical composition NaBO3. It crystallizes as the monohydrate, NaBO3·H2O, trihydrate, NaBO3·3H2O and tetrahydrate, NaBO3·4H2O. The monohydrate and tetrahydrate are the commercially important forms.
Sodium perborate releases oxygen rapidly at temperatures over 60°C. To make it active at lower temperatures (40–60 °C), it has to be mixed with a suitable activator, typically tetraacetylethylenediamine (TAED).
Sodium Perborate BP (Hydrated Sodium Perborate, Ph Eur monograph 1997)
CAS Number: 7632-04-4
Action and use: Antiseptic.
Content: 96.0 per cent to 103.0 per cent.
Appearance: Colourless, prismatic crystals or white or almost white powder, stable in the crystalline form.
Solubility: Sparingly soluble in water, with slow decomposition. It dissolves in dilute mineral acids.
A. Mix 1 ml of a saturated solution with a mixture of 1 ml of dilute sulphuric acid and 0.2ml of a 70 g/l solution of potassium dichromate, shake with 2 ml of ether and allow to stand. A blue colour is produced in the ether layer.
B. The mixture obtained by treating about 100 mg with 0.1 ml of sulphuric acid and 5 ml of methanol burns with a greenish flame when ignited.
C. It gives reaction of sodium.
Chlorides: Maximum 330 ppm.
Sulphates: Maximum 1.2 per cent.
Iron: Maximum 20 ppm.
Heavy metals: Maximum 10 ppm.
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