Definition
A group of highly toxic chemical compounds containing the cyanide ion (CN⁻), used in metal-finishing processes such as case hardening and electroplating of aircraft parts. When heated or brought into contact with acids, cyanide salts release hydrogen cyanide gas, which is rapidly fatal if inhaled.
Plain English
Poisonous chemicals used in some metal-treatment processes for aircraft parts. They are dangerous to handle because they can release a deadly gas if heated or mixed with acid.
Context Anchor
Seen in aircraft maintenance, repair-shop safety information, chemical storage labels, and metal-finishing procedures.
Derivation
From the Greek 'kyanos,' meaning 'dark blue.' The name comes from Prussian blue, the deep blue pigment from which cyanide compounds were first isolated. 'Salt' here is the chemistry sense — a compound formed when an acid reacts with a base — not table salt.
Why Pilots Care
Pilots typically don't handle cyanide salts directly, but anyone working in or around a maintenance shop should know these chemicals are present in some processes and require strict safety procedures. Accidental contact with acid or moisture can produce lethal fumes.
Intuition Check
Do not read “salts” as table salt. Here it means solid chemical compounds that contain cyanide and can be deadly.
Example Sentence 1
The shop manual warned technicians never to bring acidic cleaners near tanks containing cyanide salts.
Example Sentence 2
Disposal procedures for used cyanide salts solutions must follow strict environmental rules.