Cyanic acid

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Overview

Cyanic acid is a colourless poisonous liquid with a boiling point of 23.5°C and a melting point of -81°C. At 0°C cyanic acid is converted to cyamelide.

In water, cyanic acid hydrolyses to carbon dioxide and ammonia.

Cyanic acid (H-O-C≡N) is an isomer of fulminic acid (H-C=N-O).

A tautomer exists for cyanic acid, H-N=C=O, isocyanic acid.

It forms in a reaction between potassium cyanate and formic acid.

The trimer of cyanic acid is cyanuric acid.

Cyanic acid is the simplest stable chemical compound that contains carbon, hydrogen, nitrogen, and oxygen, the four most commonly-found atoms in organic chemistry (fulminic acid is not stable).

See also

References

  • Handbook of Chemistry and Physics, 65th. Edition, CRC Press (1984)
  • Cyanic acid from NIST Chemistry Webbook (accessed 090906)


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