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  1. Arsenic trioxide - Wikipedia

  2. Arsenic (III) oxide | As2O3 | CID 261004 - PubChem

  3. Arsenic oxide (As2O3) | As2O3 | CID 14888 - PubChem

  4. Substance Registry Services | US EPA

  5. Arsenic Trioxide | As2O3 | CID 58886963 - PubChem

  6. Arsenic | Medical Management Guidelines | Toxic Substance Portal …

  7. Arsenic trioxide | As2O3 - ChemSpider

  8. Arsenic(III) oxide | 1327-53-3 - ChemicalBook

  9. Arsenic trioxide - NIST Chemistry WebBook

  10. Arsenic trioxide | As2O3 - ChemSpider