Hydrogen Peroxide

About Hydrogen Peroxide

Hydrogen Peroxide (CAS 7722-84-1), formula H₂O₂, is a clear, colorless liquid and a powerful oxidizing agent widely used for disinfection, bleaching, and chemical synthesis. At industrial concentrations, it acts as a versatile reagent in applications ranging from municipal wastewater treatment to high-purity semiconductor manufacturing. As an environmentally benign chemical, it decomposes into only water and oxygen, making it a preferred choice for green chemistry initiatives.

Common Applications

Water Treatment & Pool Care: Used as a non-chlorine shock and in Advanced Oxidation Processes (AOP) to eliminate organic contaminants at concentrations typically between 27% and 35%.
Semiconductor Manufacturing: High-purity ACS and electronic-grade H₂O₂ are essential for Piranha etch solutions and wafer cleaning to remove organic residues from silicon substrates.
Horticulture & Agriculture: Applied at 3% to 10% dilutions to treat root rot by oxygenating the rhizosphere and eliminating anaerobic pathogens.
Surface Disinfection: Utilized in commercial facility maintenance to sanitize high-touch surfaces and artificial turf without leaving toxic residues.
Pulp and Textile Bleaching: Acts as a high-efficiency bleaching agent for paper pulp and natural fibers, operating optimally at alkaline pH levels.
Wastewater Remediation: Oxidizes hydrogen sulfide (H₂S) and cyanides in industrial effluent to reduce odor and toxicity before discharge.
Industrial Cleaning Recipes: Served as a core component in localized cleaning formulations for industrial degreasing and stain removal.

What We Carry

Alliance Chemical stocks Hydrogen Peroxide in concentrations ranging from 3% to 50% in Technical and ACS grades. Packaging options include 1-quart bottles, 1-gallon containers, 5-gallon pails, 55-gallon drums, and 275-gallon IBC totes.

Grade	Typical Concentration	Best For
ACS Grade	30%, 35%	Analytical laboratory testing, high-purity electronics cleaning, and reagent synthesis.
Technical Grade	3%, 10%, 12%, 25%, 50%	Industrial bleaching, wastewater treatment, and general surface sanitization.
Specialty Dilutions	Custom	Horticulture, pool treatment, and specific proprietary industrial processes.

Safety & Handling

Hydrogen Peroxide is a strong oxidizer and corrosive liquid classified under GHS03 (Oxidizers), GHS05 (Corrosion), and GHS07 (Exclamation Mark). High concentrations (30%+) can cause severe skin burns, eye damage, and may spontaneously ignite combustible materials upon contact. Proper PPE, including chemical-resistant nitrile or PVC gloves, splash goggles, and a face shield, is mandatory when handling concentrated solutions.

Storage must comply with OSHA 29 CFR 1910.1200 and NFPA 430 (Code for the Storage of Liquid and Solid Oxidizers). Containers must be stored in a cool, well-ventilated area away from sunlight, heat sources, and incompatible organics or metals. Vented caps are essential for large containers to prevent pressure build-up from natural decomposition. In the event of a spill, neutralize with copious amounts of water. Refer to the Safety Data Sheets for detailed response protocols.

Sourcing & Quality

Shipped from Taylor, Texas — same-day on in-stock items.

COA included with every order. Certificate of Analysis documents lot-specific purity and specifications.

Trusted since 1998 by 50,000+ customers including NASA, the Department of Defense, and Fortune 500 manufacturers.

Reviewed by Andre Taki, Lead Product Specialist — 20+ years in industrial chemical distribution

✓ SDS Included ✓ COA Available ⚡ Same-Day Shipping ★ No Minimum Order

Last updated: March 2026

Frequently Asked Questions

What is the difference between Technical Grade and ACS Grade hydrogen peroxide?

ACS Grade hydrogen peroxide meets or exceeds the purity standards set by the American Chemical Society, ensuring low levels of metallic impurities and stabilizers for laboratory and electronic use. Technical Grade is designed for industrial applications like bleaching and wastewater treatment where trace impurities do not interfere with the process, providing a more cost-effective solution for bulk operations.

What are the OSHA storage requirements for 50% hydrogen peroxide?

Under OSHA 29 CFR 1910.106 and NFPA 430, hydrogen peroxide concentrations of 50% are classified as Class 3 Oxidizers. They must be stored in vented containers to prevent pressure rupture and kept in fire-resistant areas away from incompatible materials like alcohols, ethers, and flammable solvents. Facilities must also ensure secondary containment and proper labeling according to the Hazard Communication Standard.

How should I dilute 35% hydrogen peroxide to a 3% solution?

To dilute 35% H2O2 to 3%, use the C1V1 = C2V2 formula: mix approximately 1 part 35% peroxide into 11 parts distilled or deionized water. Always add the peroxide to the water (never water to concentrated acid/oxidizer) to manage the heat of dilution and prevent splashing. Use only clean, high-density polyethylene (HDPE) or glass containers to avoid catalytic decomposition from metal contaminants.

Is hydrogen peroxide considered a hazardous material for shipping?

Yes, hydrogen peroxide solutions greater than 8% are regulated by DOT 49 CFR 172.101. Solutions between 20% and 60% are typically assigned UN 2014, Class 5.1 (Oxidizer) with a Class 8 (Corrosive) sub-hazard, requiring specific hazard placards, vented packaging, and certified hazmat handlers for transportation. Smaller quantities may qualify for Limited Quantity exceptions depending on concentration and pack size.

How do I shock a pool with 35% hydrogen peroxide?

For chlorine-free pool maintenance, use 1 cup of 35% hydrogen peroxide per 250 gallons of water for an initial shock, or 1 gallon per 10,000 gallons for maintenance. Ensure the pump is running to provide adequate circulation and allow the level to drop to 30-50 ppm before swimming. Consult our specific guide on chlorine-free swimming for detailed dosing based on water volume and organic load.

What is the shelf life of 30% ACS Grade hydrogen peroxide?

Concentrated hydrogen peroxide typically decomposes at a rate of less than 1% per year when stored in original, unopened containers in a cool, dark environment. Exposure to sunlight, heat above 77°F (25°C), or dust can accelerate decomposition significantly. For critical laboratory work using ACS Grade material, it is recommended to test the concentration via titration if the product is more than 12 months old.

Does hydrogen peroxide require a special spill kit for industrial disposal?

Yes, spills of concentrated H2O2 must be handled using non-combustible absorbents like vermiculite or clay; never use sawdust or paper as they may catch fire. According to EPA RCRA regulations, concentrated peroxide may be classified as a D001 (ignitable) or D002 (corrosive) hazardous waste if not properly diluted. Small spills should be neutralized with large volumes of water and directed to a dedicated chemical sewer if permitted by local wastewater authorities.

What concentration of hydrogen peroxide is used in semiconductor Piranha etching?

Piranha etch solutions generally utilize 30% or 31% ACS Grade hydrogen peroxide mixed with 96-98% sulfuric acid in ratios typically between 1:3 and 1:5. This mixture is highly exothermic and dangerous, requiring specialized quartz or PTFE vessels. The high-purity ACS grade is necessary to prevent metal ion contamination on the semiconductor wafer surface.