Why is CH3COOH called glacial acetic acid?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
CH3COOH is called glacial acetic acid when it's in its pure, concentrated form (typically 99-100% acetic acid). The term "glacial" comes from its unique property of forming ice-like crystals when cooled below 16.6°C (62°F). At this temperature, pure acetic acid solidifies into clear, ice-like crystals that resemble glacial ice, hence the distinctive name. This differentiates it from diluted forms like vinegar.
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