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The Claim

"Dihydrogen dioxide" is an incorrect or nonstandard name for hydrogen peroxide (H2O2) in chemical nomenclature.

Verified by Lenz ·

The Short Version

The evidence does not support calling “dihydrogen dioxide” an incorrect name for H2O2. It is an accepted IUPAC compositional name, although “hydrogen peroxide” is the preferred and overwhelmingly standard name in scientific and regulatory usage. The claim conflates “not preferred” with “not accepted,” which materially changes the takeaway.

Caveats

  • “Non-preferred” is not the same as “incorrect”: IUPAC allows multiple valid naming systems for the same compound.
  • Database and regulatory listings favor “hydrogen peroxide,” but prevalence alone does not prove alternative accepted names are nonstandard.
  • The wording “incorrect or nonstandard” blurs an important distinction between common usage and formal nomenclature validity.

The Receipts

  1. Hydrogen Peroxide | H2O2 | CID 784 - PubChem

    PubChem

  2. Hydrogen peroxide - the NIST WebBook

    NIST WebBook

  3. Why is H2O2 named hydrogen peroxide? - Chemistry Stack Exchange

    Chemistry Stack Exchange

  4. Hydrogen peroxide (H2O2) - Substance Details - SRS

    US EPA

  5. Hydrogen peroxide | H2O2 - ChemSpider

    ChemSpider

  6. Hydrogen Peroxide H2O2 CID 784 - PubChem (PDF)

    16streets.com (hosting PubChem PDF)

  7. Glossary: Hydrogen peroxide

    European Commission (EU health)

  8. Hydrogen peroxide [USP] - PubChem

    PubChem

  9. (2H2)hydrogen peroxide | H2O2 | CID 22789539 - PubChem

    PubChem

  10. IUPAC Blue Book | Nomenclature for Organic Chemistry - ACD/Labs

    ACD/Labs

+ 17 more sources — see the full list on Lenz

Filed Under

Hydrogen PeroxideInternational Union Of Pure And Applied Chemistry

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