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| Synonyms:Bromic acid, sodium salt Sodium bromate crystal Molecular Formula:BrNaO3 Molecular Weight: 150.89 HS Code: 2829900090 Grade: Industrial grade，99.5% Hazard Class:Class5.1 | |||||||||
7789-38-0
boss chem
7789-38-0
Sodium bromate is a white, freely water-soluble crystalline salt of bromic acid in which bromine is in the +5 oxidation state — a strong, selective oxidizing agent. Its best-known role is the neutralizer (second solution) of permanent hair-waving systems, where it re-oxidizes the hair's thiol groups to rebuild the disulfide bonds that give the permanent wave its shape.
The same oxidizing power serves analytical chemistry (bromate titration standards, phenol determination), textile processing (oxidation of sulfur and vat dyes), industrial cleaning, and even gold dissolution when mixed with sodium bromide. One oxidizer, four established industries — with a regulatory classification (carcinogenic, Carc. 1B under EU CLP) that buyers must know and manage.
A single salt, four core value propositions:
Hair Permanent-Wave Neutralizers:
● the standard second-solution oxidizer that rebuilds disulfide bonds after reducing the hair;
Analytical & Oxidizing Reagents:
● a bromate standard and oxidizing reagent for titrations and phenol determination;
Textile & Industrial Oxidation:
● an oxidizer for sulfur/vat dyes, wool finishing and boiler cleaning;
Gold Dissolution & Specialty:
● a gold-dissolving partner of sodium bromide and a brominating agent for aromatics.
Item | Specification |
Chemical Name | Sodium bromate (NaBrO₃) |
Synonyms | Sodium bromate; Bromic acid, sodium salt; NaBrO₃ |
CAS No. | 7789-38-0 |
EC No. (EINECS) | 232-160-4 |
Molecular Formula | NaBrO₃ |
Molecular Weight | 150.89 g/mol |
Appearance | White crystalline powder or granules |
Melting Point | ≈ 381 °C |
Density | ≈ 3.34 g/cm³ |
Solubility | Freely soluble in water (≈ 36.4 g/100 ml at 20 °C); slightly soluble in alcohols |
Decomposition | > 350 °C (releases bromine/oxygen) |
Oxidation State | Bromine(V) — strong oxidizing agent |
Sodium bromate carries the bromate ion (BrO₃⁻) with bromine in the +5 oxidation state, giving it strong oxidizing character: it decomposes above 350 °C releasing bromine and oxygen, and it oxidizes reduced species under mild aqueous conditions. In permanent waving, the first solution (thioglycolate) reduces hair keratin disulfide bonds; the second solution — typically about 10% sodium bromate — oxidizes the residual thiol groups back to disulfide bonds, locking in the new curl without the harshness of strong oxidants.
With sodium bromide, sodium bromate generates bromine in situ, which dissolves gold and other noble metals in hydrometallurgical extraction. Assay, pH and impurity data are documented on the COA.
● Controlled oxidizing action: selectively re-oxidizes thiols to disulfides — the mechanism of permanent-wave neutralization.
● Gentler than strong oxidants: a milder wave neutralizer than hydrogen-peroxide systems for hair care (10% solution standard).
● Analytical reliability: a classic bromate standard for redox titrations and phenol determination.
● Textile oxidizing power: effective oxidizer for sulfur and vat dye oxidation in continuous and batch dyeing.
● Gold-dissolution chemistry: with sodium bromide, generates bromine for dissolving gold and noble metals.
● High water solubility: dissolves rapidly (≈ 36.4 g/100 ml at 20 °C) for easy bath preparation.
● Multi-industry reach: cosmetics, analysis, textiles, cleaning and hydrometallurgy from one salt.
Sodium bromate is the classic second-solution oxidizer of permanent waving:
● Wave neutralizer: oxidizes residual hair thiols, rebuilding disulfide bonds and fixing the curl;
● Standard strength: about 10% sodium bromate in neutralizing lotions (2% potassium bromate equivalent);
● Gentle wave service: milder oxidation with less hair damage than hydrogen-peroxide systems;
● Regulated use: subject to cosmetic ingredient and concentration regulations in major markets.
● Bromate titration: standard oxidant for iodometric and redox titrations;
● Phenol determination: reagent in phenol and cresol analytical methods;
● Laboratory bromine source: generates bromine in situ for bromination chemistry;
● Standard reagent: high-purity analytical grade for quantitative analysis.
● Sulfur and vat dyes: oxidation of leuco dyes to the final colored form in continuous/batch dyeing;
● Wool finishing: oxidizing and finishing agent in wool processing;
● Boiler cleaning: oxidizing cleaner for industrial boiler systems;
● Bleaching and processing: oxidative treatment in textile and paper processing.
● Gold extraction: with sodium bromide, generates bromine that dissolves gold in hydrometallurgy;
● Noble-metal refining: oxidative dissolution and purification of precious metals;
● Aromatic bromination: brominating agent for nitrobenzene, benzoic acid and benzaldehyde;
● Specialty oxidation: laboratory and industrial oxidative chemistry.
Packaging (customizable):
● 25 kg fiber drum with PE liner, 25 kg multi-wall bag, or 500 kg – 1,000 kg FIBC;
Storage:
● Keep in a cool, dry, well-ventilated area away from direct sunlight and heat;
● Keep containers tightly closed to prevent moisture pick-up and caking;
● Store away from reducing agents, combustibles and organics (strong oxidizer — fire hazard);
● Recommended storage temperature 5 °C – 35 °C.
● Factory-direct supply: own production capacity, transparent pricing, no middleman markup;
● Stable quality: strict internal control, every batch tested, COA with every shipment;small trial orders accepted.
● Export experience: familiar with sea/air shipping documentation for chemical commodities, complete paperwork support;
Q1: What is sodium bromate used for?
Sodium bromate is used as the second-solution neutralizer of permanent hair waving (about 10% solution), as an analytical reagent and bromate titration standard, as an oxidizer for sulfur and vat dyes and wool finishing, in boiler cleaning, and with sodium bromide for dissolving gold and noble metals.
Q2: How does sodium bromate neutralize a permanent wave?
In a permanent wave, the first solution (a reducing thioglycolate) breaks the hair's disulfide bonds so the hair can be reshaped. The second solution — sodium bromate — oxidizes the residual thiol (SH) groups back to disulfide (S–S) bonds, locking the hair in its new curled shape. Sodium bromate does this more gently than strong oxidants like hydrogen peroxide, reducing hair damage.
Q3: What is the difference between sodium bromate and potassium bromate?
They are the sodium and potassium salts of bromic acid with the same oxidizing chemistry and uses. Sodium bromate is more water-soluble and is used at about 10% in wave neutralizers; potassium bromate is less soluble and used at about 2%. Both are classified as carcinogenic (Carc. 1B under EU CLP) and are subject to strict regulation — handle and ship accordingly.
Q4: Is sodium bromate safe to handle?
No — sodium bromate is classified as carcinogenic (Carc. 1B, H350 under EU CLP), harmful if swallowed (H301), and associated with hearing organ toxicity (H373); it is also a strong oxidizer that can cause fires with combustibles. Use full protective equipment, avoid dust and ingestion, store away from oxidizable materials, and comply strictly with the destination market's dangerous-goods and cosmetic regulations. It is an industrial chemical, not a food ingredient.
