hydrogen peroxide

noun

: an unstable compound H₂O₂ used especially as an oxidizing and bleaching agent, an antiseptic, and a propellant

Examples of hydrogen peroxide in a Sentence

Recent Examples on the Web

Chang Chun, a Taiwanese petrochemical firm, now manufactures electronic-grade hydrogen peroxide in Casa Grande, a city of some 70,000 people halfway between Phoenix and Tucson. — Gaby Del Valle, The Verge, 29 Oct. 2026

Follow these steps to use hydrogen peroxide to keep your home mold free. — Karen Brewer Grossman, Southern Living, 21 Oct. 2026

If there is greasy buildup, use hydrogen peroxide instead of water to lend extra grease-cutting power. — Jolie Kerr, Better Homes & Gardens, 21 Oct. 2026

To tackle this challenge, the Chinese researchers turned to a two-electron reaction that involves oxygen and hydrogen peroxide, which is faster and more reversible. — Georgina Jedikovska, Interesting Engineering, 15 Oct. 2026

Word History

First Known Use

1872, in the meaning defined above

Rhymes for hydrogen peroxide

• aminoglycoside
• chlordiazepoxide
• dimethylformamide
• oligosaccharide
• paraformaldehyde
• polynucleotide
• ribonucleotide
• abide
• allied
• applied
• aside
• astride

Kids Definition

hydrogen peroxide

noun

: an unstable liquid compound containing hydrogen and oxygen and used especially for bleaching and as an antiseptic

Medical Definition

hydrogen peroxide

noun

: an unstable compound H₂O₂ used especially as an oxidizing and bleaching agent and as an antiseptic