Hydrogen peroxide (H2O2) is one of the most widely consumed oxidizing chemicals in modern industry. Because it decomposes into nothing but water and oxygen, hydrogen peroxide has become the "clean oxidizer" of choice for textile bleaching, pulp and paper, water treatment, aseptic food packaging and mining. In this guide we cover what the 3%, 35% and 50% grades are used for, how to handle an oxidizer safely, and what industrial and export buyers should expect from a reliable supplier in Turkey.
What Is Hydrogen Peroxide (H2O2)?
Hydrogen peroxide is a clear, colorless liquid, slightly denser than water and miscible with it in all proportions. The molecule consists of two hydrogen and two oxygen atoms (H2O2), and the weak oxygen-oxygen bond at its center is what makes it such an effective oxidizing agent.
Its defining property is the cleanliness of its decomposition:
2 H2O2 → 2 H2O + O2 (+ heat)
Unlike chlorine-based bleaches, it leaves behind no salts, no AOX and no chlorinated by-products. That is why textile, paper and environmental industries facing tighter discharge regulations have largely replaced chlorine chemistry with peroxide chemistry.
| Property | Value / Note |
|---|---|
| Chemical name | Hydrogen peroxide |
| Common names | Oxygenated water, perhydrol |
| CAS number | 7722-84-1 |
| EC number | 231-765-0 |
| Molecular formula | H2O2 |
| Molecular weight | 34.01 g/mol |
| Appearance | Clear, colorless liquid |
| Commercial grades | 3%, 35%, 50% (special: 60%+) |
| GHS pictograms | GHS03 (oxidizer), GHS05 (corrosive), GHS07 |
| ADR class | 5.1 (oxidizing substances) |
Commercial hydrogen peroxide is never "pure" H2O2. It is always produced and sold as an aqueous solution containing ppm-level stabilizers that slow down natural decomposition. As the concentration rises, both the active oxygen content and the safety requirements rise with it.
How It Is Produced and Why It Is Stabilized
Virtually all of the world's hydrogen peroxide is manufactured by the anthraquinone auto-oxidation process. An anthraquinone derivative is first hydrogenated, then oxidized with air; the H2O2 formed in the loop is extracted with water and distilled up to commercial concentrations. Because the working solution circulates continuously, the process delivers large tonnages at competitive cost.
Pure hydrogen peroxide is thermodynamically unstable and slowly splits into water and oxygen even under good conditions. Commercial products therefore carry a stabilizer package:
- Tin- and phosphate-based stabilizers that suppress catalytic decomposition
- Chelating agents that bind trace iron and copper from process water
- Slightly acidic pH adjustment, since alkaline conditions accelerate breakdown
The stabilizer content also defines the quality grade. Technical grade is the standard for textiles, water treatment and general industry. Food/aseptic grade is produced with lower stabilizer and impurity limits for food-contact processes, while electronic grades push metal impurities down to ppb levels. Choosing the right grade is the first purchasing decision, and the batch COA (certificate of analysis) is how you verify it.
Concentration Guide: 3%, 35% and 50% Hydrogen Peroxide
Selecting the right concentration directly affects both process efficiency and logistics cost. Higher concentrations are cheaper per kilogram of active oxygen, but they also raise the bar for storage, staff training and ADR compliance.
| Concentration | Typical application | Safety note |
|---|---|---|
| 3% (oxygenated water) | Personal care, pharmacy, light surface hygiene | Low risk; still avoid eye contact |
| 35% | Textile bleaching, aseptic food packaging, disinfection, cosmetic raw material | Serious eye damage hazard; GHS05 — goggles and gloves mandatory |
| 35% food grade | Aseptic filling (PET/carton sterilization), food-contact processes | Food-suitability statement and batch COA traceability required |
| 50% | Pulp and paper bleaching, wastewater treatment (AOP), mining, high-tonnage textile | Strong oxidizer + corrosive; vented packaging, segregated storage area |
| 60% and above | Specialty synthesis, propulsion systems | ADR PG I; not recommended for standard industrial use |
Rule of thumb: plants with modest daily consumption and limited handling equipment should start with 35%. Facilities running continuous dosing lines with trained personnel usually switch to 50%, because each delivery carries more active oxygen and the total landed cost per ton of "real" product drops.
Textile Bleaching: Hydrogen Peroxide with Caustic Soda
Textile finishing is the single largest consumer of hydrogen peroxide in Turkey. In the bleaching (scouring-bleaching) of cotton and blended fabrics, H2O2 has almost entirely displaced chlorite and hypochlorite.
Peroxide bleaching works in an alkaline medium, which is why the second indispensable component of every recipe is sodium hydroxide (caustic soda). A typical bleaching bath contains:
- Hydrogen peroxide (35% or 50%): the active bleaching agent
- Caustic soda: raises the pH to 10.5-11.5 so that the active perhydroxyl anion (HOO-) can form
- Stabilizer (silicate or organic): prevents uncontrolled decomposition and protects the fiber
- Wetting and sequestering agents: ensure even penetration and mask metal ions
Full whiteness is achieved at 90-98 °C, while cold pad-batch bleaching offers an energy-saving alternative. If the recipe balance is lost — especially in the presence of iron, copper or manganese ions — the peroxide decomposes locally on the fabric and causes catalytic damage (pinholes). Water quality and sequestering agent selection are therefore critical.
Because bleaching creates the hydrophilicity that every subsequent dyeing and finishing step depends on, it effectively sets the quality ceiling of the whole process. For the full picture of the finishing chain, see our textile finishing chemicals guide.
Pulp and Paper Bleaching
In the paper industry, hydrogen peroxide is the core oxidizer of TCF (totally chlorine-free) and ECF (elemental chlorine-free) bleaching sequences. It is the standard chemical for brightening mechanical pulp (TMP/CTMP) and for post-deinking bleaching of recycled fiber.
Consumption in this segment is measured in tanker loads, so the typical choice is 50% concentration delivered in IBCs or bulk tankers. Alkaline peroxide bleaching again runs alongside caustic soda and sodium silicate, with magnesium sulfate added as a fiber protector.
Water and Wastewater Treatment: Advanced Oxidation (AOP)
The fastest-growing application of hydrogen peroxide is water and wastewater treatment. On its own, H2O2 is a moderate oxidizer; activated by a catalyst or UV light, it generates highly reactive hydroxyl radicals (·OH). This principle is known as advanced oxidation processes (AOP).
Key applications include:
- Fenton process (H2O2 + Fe2+): dye-laden textile effluents and hard-to-treat industrial COD
- UV/H2O2: destruction of micropollutants, pesticides and pharmaceutical residues in drinking water
- Peroxone (H2O2 + ozone): a high-efficiency AOP combination
- H2S and odor control: sulfide oxidation in sewer networks
- Dechlorination: neutralizing free chlorine in process water
For treatment plants the advantages are clear: dosing is simple, no extra sludge is generated, and the residues are water and oxygen. For textile and chemical plants struggling with discharge limits, a Fenton unit is often the lowest-capex COD solution available.
Dosing practice: in Fenton applications the H2O2/COD and Fe/H2O2 ratios must be optimized per plant using jar tests; blind overdosing wastes chemical and leaves residual peroxide in the effluent. Residual peroxide must be quenched before any biological stage, otherwise it inhibits the activated sludge. For continuously dosed plants, 50% grade cuts freight and handling per ton of active oxygen and noticeably reduces operating cost.
Disinfection, Food and Aseptic Packaging
Hydrogen peroxide is a broad-spectrum biocide, effective against bacteria, viruses, yeasts and molds. In industrial hygiene it appears in three main forms:
- Liquid surface disinfection: food processing lines, CIP systems, cold rooms
- Vapor phase (VHP): pharmaceutical cleanrooms, isolators, room decontamination
- Peracetic acid formulations: H2O2 combined with acetic acid for more aggressive sanitation products
The most demanding food application is aseptic packaging: on UHT milk and juice filling lines, the inner surface of cartons and PET preforms is sterilized in a hot bath or spray of 35% food-grade hydrogen peroxide. Because residue limits in the finished package are extremely low, food-grade quality and batch-level COA documentation are non-negotiable in this application.
For detergent and cleaning-product manufacturers, peroxide is also the backbone of oxygen-based bleach systems; see our overview of cleaning and detergent chemicals for the wider raw material set.
Mining and Other Industrial Uses
In gold mining, hydrogen peroxide is a standard oxidizer for cyanide detoxification of process effluents, converting cyanide into far less toxic cyanate. It is also dosed as an oxygen source in leaching circuits to improve recovery.
Other significant uses include:
- Chemical synthesis: perborates, percarbonates, organic peroxides and epoxidation reactions
- Electronics: printed circuit board (PCB) surface treatment and micro-etching baths
- Metal surface treatment: stainless steel passivation and pickling bath regeneration
- Aquaculture: oxygen support and parasite control in fish farming
A single molecule serving this many industries also means one thing on the supply side: every sector expects a different concentration, quality grade and packaging format, and the supplier has to manage all of them.
Oxidizer Safety: GHS Classification and Handling
Hydrogen peroxide is not flammable itself; it is an oxidizer that intensifies fire. At industrial concentrations (35-50%) it is labeled under GHS with the GHS03 (flame over circle — oxidizer) and GHS05 (corrosion) pictograms, and the classification becomes stricter as concentration increases.
Three core risks must be managed on site:
- Uncontrolled decomposition: heat, light, alkaline contact and above all transition-metal contamination (iron, copper, chromium, brass) catalyze breakdown. The oxygen released can build dangerous pressure in sealed containers.
- Fire intensification: the product does not burn, but when absorbed into paper, wood or textiles it makes ignition far easier. Contact with organics — solvents, oils, greases — must be strictly prevented.
- Skin and eye damage: grades of 35% and above pose a serious eye damage hazard and cause temporary skin whitening and chemical burns. Chemical goggles, a face shield, nitrile/PVC gloves and an apron are the standard PPE set.
Golden rules: never return unused product to the original container, never let foreign chemicals enter the peroxide line, and dilute any spill with plenty of water. For practical guidance on reading labels and safety data sheets, see our GHS/CLP labeling guide.
Storage: Stabilizers, Light Protection and HDPE Packaging
Stored correctly, hydrogen peroxide retains its activity for many months; stored badly, you lose both product strength and safety margin. The essentials:
- Vented closures: H2O2 packaging uses special vented caps that release the oxygen formed by slow decomposition. Never replace them with solid plugs.
- Compatible materials: standard packaging is HDPE jerrycans, drums and IBCs. Bulk storage tanks are built from passivated stainless steel (304/316) or high-purity aluminum; ordinary carbon steel, copper and brass are strictly unsuitable.
- Protection from light and heat: store in cool (ideally below 30 °C), well-ventilated areas away from direct sunlight. Packaging is opaque precisely because light accelerates decomposition.
- Segregation: keep physically separated from acids, alkalis, metal powders, organic solvents and combustibles; floors should be washable and drained.
- Stock rotation: apply FIFO, and verify the assay of long-stored batches by permanganate titration.
Warehouse layout, segregation matrices and spill response are covered in detail in our chemical storage and ADR transport guide.
Transport Under ADR Class 5.1
By road, hydrogen peroxide is transported as an ADR Class 5.1 (oxidizing substances) dangerous good; the UN number and packing group depend on concentration:
| Concentration | UN number | ADR class / PG |
|---|---|---|
| 8-20% | UN 2984 | 5.1, PG III |
| 20-60% (incl. 35% and 50%) | UN 2014 | 5.1 (+8 subsidiary), PG II |
| 60% and above | UN 2015 | 5.1 (+8), PG I |
In practice this means orange-plated, ADR-certified vehicles, trained drivers and correct transport documents on every shipment. Packages must be UN-certified and carry the Class 5.1 hazard label with the UN 2014 marking. The receiving site should also have an oxidizer acceptance procedure in place at the unloading ramp.
Export Documentation for International Buyers
For export orders, paperwork matters as much as the product. Buyers sourcing hydrogen peroxide from Turkey should expect a complete document set with every shipment:
- English MSDS (SDS) prepared for the destination market's hazard communication needs
- Batch COA stating assay, stabilizer type and key impurity values
- Dangerous goods documentation: ADR transport document for road legs and, for sea freight, IMDG Class 5.1 declarations (UN 2014) prepared with the forwarder
- Commercial set: proforma invoice, packing list and certificate of origin, with Incoterms (EXW, FCA, FOB, CIF) agreed at quotation stage
- UN-certified packaging suitable for oxidizers, with vented closures and palletized, strapped loading
Import registration and notification obligations in the destination country belong to the importer; a professional supplier supports the process by supplying accurate composition data and documentation on time. Turkey's logistics position — short transit times to the EU, Middle East and North Africa — makes it an increasingly attractive sourcing base; see our overview of chemical supply and export from Turkey for the broader picture.
Supply, Pricing and Ordering from Yüksek Kimya
Hydrogen peroxide pricing depends on concentration, quality grade (technical vs. food grade), order tonnage and delivery format. The right supplier offers not just a competitive price but uninterrupted, fully documented supply.
From our facility in Kestel, Bursa, we ship across Turkey and support export buyers with:
- Concentrations: 35% and 50% technical grade; food-grade alternative for food-contact applications
- Packaging: vented HDPE jerrycans, drums, IBCs (1000 L) and tanker deliveries for bulk consumers
- Documentation: MSDS and batch COA with every delivery; operations certified to ISO 9001, ISO 14001, ISO 45001 and GHP
- Logistics: ADR-compliant, scheduled shipments with fast lead times for urgent needs
- Technical support: field experience in concentration selection, storage layout and recipe compatibility
Alongside peroxide, you can source the caustic soda, stabilizers and wetting agents of your bleaching recipe from a single point. Browse our industrial chemicals and additives category, or go straight to the hydrogen peroxide product page for specifications.
To request a quote: reach us through our contact page or call us directly — tell us your tonnage, concentration and delivery point, and we will return a tailored offer the same day.
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Frequently Asked Questions
What is hydrogen peroxide and what is its CAS number?
Hydrogen peroxide is a colorless, water-miscible liquid and a powerful oxidizer. Its chemical formula is H2O2 and its CAS number is 7722-84-1. Dilute solutions are known as 'oxygenated water'; in industry, 35% and 50% aqueous solutions are the standard commercial grades.
What is the difference between 35% and 50% hydrogen peroxide?
Both are aqueous solutions of the same molecule; the difference is active oxygen content and the associated handling requirements. 35% is common in textile bleaching, disinfection and aseptic packaging, while 50% offers a lower cost per unit of active oxygen for pulp bleaching, wastewater treatment and high-tonnage processes, but demands stricter storage and transport controls.
How should hydrogen peroxide be stored?
In its original HDPE packaging with vented closures, in a cool, well-ventilated area protected from direct sunlight. Heat, alkaline contact and metal contamination accelerate decomposition and build oxygen pressure. Never transfer it to tightly sealed metal containers and never return unused product to the original drum.
Where can I buy hydrogen peroxide in bulk from Turkey?
Yüksek Kimya, a B2B chemical distributor based in Kestel, Bursa, supplies 35% and 50% hydrogen peroxide in jerrycans, drums, IBCs and tanker loads. Every shipment includes MSDS and batch COA, with ADR-compliant transport and fast quotations by phone or e-mail for domestic and export buyers.