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  1. Formaldehyde - Wikipedia

  2. Formaldehyde | Preservative, Solution, & Exposure | Britannica

  3. Formaldehyde | H2CO | CID 712 - PubChem

  4. Methanal (Formaldehyde) - Essential Chemical Industry

  5. Formaldehyde - Simple English Wikipedia, the free encyclopedia

  6. Formaldehyde - NIST Chemistry WebBook

  7. Methanal - (Organic Chemistry) - Vocab, Definition ... - Fiveable