-
What it is. This hydrogen peroxide is a 30-32% aqueous solution, supplied in a 1-pint size. It is a clear, colorless, strong oxidizer used for oxidation reactions, sample digestion, cleaning, and preparing diluted peroxide solutions.
-
How concentrated it is. At about 30% and a density of about 1.11 g/cm³, the solution contains roughly 333 g of H2O2 per liter, about 9.8 M (calculated). That corresponds to roughly 100 to 110 volumes of oxygen released per volume of solution on complete decomposition (calculated).
-
How it works. Hydrogen peroxide is a strong oxidizer that decomposes to water and oxygen. It oxidizes organic matter, metals, and many inorganic species, and it can also act as a reducing agent toward stronger oxidizers such as permanganate. Its only by-products are water and oxygen.
-
Stability and decomposition. Hydrogen peroxide slowly decomposes even when stored correctly, and metals, dust, alkalinity, heat, and light accelerate it. Commercial grades contain small amounts of stabilizer. Decomposition releases oxygen gas and heat, so never seal containers airtight.
-
Laboratory uses. At 30% strength, hydrogen peroxide digests organic matter for metals analysis with nitric acid, supports Fenton chemistry with iron catalysts, drives oxidation reactions in synthesis, cleans glassware, and serves as the oxidant in semiconductor cleaning solutions such as SC-1 and SC-2.
-
Semiconductor cleaning solutions. In wafer processing, 30% hydrogen peroxide is the oxidant in SC-1 (with ammonium hydroxide and water) to remove particles and organics, and in SC-2 (with hydrochloric acid and water) to remove metal contamination.
-
Preparing dilutions. Dilute with deionized water to make working strengths: 1 part 30% plus 9 parts water gives about 3% (calculated). Use clean glass or compatible plastic labware and never return unused solution to the original container.
-
Hazards at this strength. Thirty percent hydrogen peroxide is harmful if swallowed and causes serious eye damage. It bleaches and irritates skin on contact, and it can ignite combustible materials it soaks into. Wear goggles, gloves, and a lab coat.
-
Where it is used. Laboratories and industry use 30% hydrogen peroxide for wet digestion, organic oxidation, wastewater treatment studies, semiconductor wafer cleaning, bleaching, disinfection research, and as a stock for preparing diluted peroxide solutions.
Technical Specifications
| Chemical Name |
Hydrogen peroxide, aqueous solution |
| CAS Numbers |
7722-84-1 (hydrogen peroxide); 7732-18-5 (water) |
| EC Number |
231-765-0 |
| Synonyms |
Hydrogen dioxide, perhydrol (concentrated), peroxide |
| Formula (active) |
H2O2 |
| Molecular Weight (active) |
34.01 g/mol |
| Concentration |
30 to 32% |
| Density |
About 1.11 g/cm³ (20 °C) |
| Approximate Molarity |
About 9.8 M (calculated at 30%) |
| Volume Strength |
About 100 to 110 volumes (calculated) |
| Boiling Point |
About 107 °C |
| Melting Point |
Below 0 °C |
| Appearance |
Clear, colorless liquid |
| Hazard Statements (typical for 30 to 35%) |
H302 (harmful if swallowed); H318 (serious eye damage) |
| DOT |
UN2014, Hydrogen peroxide, aqueous solution, Class 5.1 (8), PG II |
| Exposure Limit |
OSHA PEL and NIOSH REL: 1 ppm TWA |
| Package Size |
1 pint |
Applications / Common Uses
-
Wet digestion: Oxidizes organic matter with nitric acid for metals analysis.
-
Semiconductor cleaning: Supplies oxidant for SC-1 and SC-2 cleans.
-
Organic oxidation: Oxidizes substrates in synthesis.
-
Fenton chemistry: Generates hydroxyl radicals with iron catalysts.
-
Dilution stock: Prepares 3% and other working strengths.
Storage, Handling & Shipping
Caution: 30% hydrogen peroxide is a strong oxidizer that causes serious eye damage and skin burns and is harmful if swallowed. It can ignite combustible materials and decomposes with release of oxygen and heat when contaminated. Wear chemical splash goggles, gloves, and a lab coat.
Store in the original container in a cool, dark, well-ventilated area away from heat, sunlight, organic materials, metals, and reducing agents. Never return unused peroxide to the original container, since contamination can trigger decomposition that releases oxygen and pressure.
-
Incompatible materials: Organic materials, flammables, reducing agents, metals and metal salts (especially iron, copper, chromium, manganese), bases, and dirt or dust.
-
Exposure limit: OSHA PEL and NIOSH REL: 1 ppm TWA.
-
Spill response: Dilute with large amounts of water and absorb with inert, non-combustible material. Never use sawdust, paper, or other combustibles.
-
First aid: Eyes: flush with water for at least 15 minutes and seek immediate medical care. Skin: Rinse thoroughly; temporary skin whitening may occur.
-
DOT / shipping: UN2014, Hydrogen peroxide, aqueous solution, Class 5.1 (8), PG II.
Related Categories & Services
Related Articles
