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**Systematic name:** Ethanal
**Molecular formula:** C₂H₄O
**Chemical formula (condensed):** CH₃CHO
**Molar mass:** 30,07 g/mol
**Information:** Acetaldehyde has a low boiling point, therefore it is a volatile acrid liquid. Three molecules of acetaldehyde condense to form paraldehyde which is a cyclic trimer containing C-O single bonds.
**Use:** It is used to manufacture acetic acid, acetic anhydride or butanol.