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Methylene oxide

CAS No.: 50-00-0

  • Molecular Formula: CH₂O
  • Molecular Weight: 30.026 g/mol

Chemical type

  • Fixative
  • Aldehyde
[1,2]

Key properties

  • Potent cross-linking agent; denatures and fixes proteins and nucleic acids.
  • Volatile with a pungent, irritating odor.
[1]
  • Gaseous pollutant, toxic
  • Purification efficiency 95-97% with TiO₂ filters
  • Decomposes to CO₂ and H₂O under photocatalysis
  • Maximum purification increases with concentration (up to 40%)
[2]
  • Primary component of FAE and FAEG fixatives for tissue preparation for light and scanning electron microscopy (SEM).
[1]
  • Air pollutant in buildings and industrial shops
  • Component in wastewater from fermentation
  • Test substance for air and water purification
[2]

Classification by use

  • Histological Fixative
  • Microscopy Sample Preparation Chemical
[1]
  • Gaseous organic pollutants
  • Indoor air contaminants
[2]

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  1. [Cite:1] Floral ontogeny and development of the model plant Nicotiana benthamiana, Current Plant Biology, Volume 45, January 2026, 100578
  2. [Cite:2] Study of Photocatalytic Properties of Titanium Dioxide in Various Media (Review), FirePhysChem, 23 January 2026