Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
HCN is the chemical formula for hydrogen cyanide, which is a weak acid. In solution, it partially dissociates to produce hydrogen ions (H⁺) and cyanide ions (CN⁻).