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hydrocyanic acid

hydrocyanic acid

9.9
A very poisonous liquid used to kill pests and make other chemicals
  • noun
  • /ˌhaɪdroʊˈsaɪənɪk ˈæsɪd/
  • Specialized
translation icon : ácido cianhídrico
  • In the laboratory, we carefully handled hydrocyanic acid due to its highly toxic nature.

Examples

  • "You've just escaped suffocation from hydrocyanic acid.

    Fiction book (2001)
  • Others might be hydrocyanic acid, hydrofluoric acid, methanol, hydrazine, and sulfur-based solvents.

    Blog text (14)
  • The pest control company used hydrocyanic acid to fumigate the infested building.

  • Exposure to hydrocyanic acid can lead to serious health complications, including respiratory failure.

Synonyms

hydrogen cyanide
vshydrocyanic acid
  • Specialized
1 7.5

A very poisonous liquid or gas that smells of bitter almonds and can kill if breathed in

is the same toxic substance but as a water solution used for fumigation
prussic acid
vshydrocyanic acid
  • Archaic
9.9

A very poisonous liquid made from hydrogen cyanide and water used to kill pests

is the same solution but given a different chemical name

Surface Forms

Morphology

hydrocyanic + acid

The compound is compositionally analyzable as 'hydrocyanic' (hydro- + cyanic) + 'acid', which signals an acid related to cyanide and therefore gives a partial clue that it is a poisonous acid. However, 'hydrocyanic' is a technical, low-frequency chemical term and understanding the precise meaning requires knowledge of 'cyanic/cyanide' and chemical naming, so a typical B1 learner who only knows basic constituent meanings would not reliably infer the exact poisonous/aqueous sense.

Etymology

The noun hydrocyanic acid comes from hydro meaning 'water' and cyanic meaning 'cyan' (a blue chemical), so the name literally points to cyanide in water. Because it is hydrogen cyanide mixed in water, the name tells people it is a very poisonous 'acid'.