Definition

Noun: * An unstable, highly explosive chemical compound with the formula HCNO. It is an isomer of cyanic acid, meaning both compounds have the same atoms but arranged in a different structure, leading to vastly different properties. Fulminic acid itself is not typically isolated; it is primarily known and studied in the form of its explosive salts (fulminates) and esters.

Usage

• The term is used almost exclusively in technical, chemical, and historical scientific contexts to refer to this specific, hazardous compound.
• It is often mentioned in contrast to its isomer, cyanic acid, to illustrate how molecular structure affects chemical behavior.
• The word fulminic derives from Latin , meaning "lightning," reflecting the compound's explosive nature.

Examples

• In a chemistry textbook: "Fulminic acid is highly unstable and dangerous, whereas its isomer, cyanic acid, is more stable."
• In a historical context: "The discovery of fulminic acid and its salts, like mercury fulminate, was pivotal in the development of percussion caps and detonators."
• Describing properties: "The extreme sensitivity of fulminic acid salts makes them useful as primary explosives."

Advanced Usage

• The concept of isomerism is central to understanding fulminic acid. It is the fulminate isomer of the formula HCNO.
• In advanced organic chemistry, its structure is often discussed as H–C≡N⁺–O⁻ (a nitrile oxide), which is responsible for its high energy and instability.

Variants and Related Words

• Fulminate (noun): A salt or ester of fulminic acid (e.g., silver fulminate, mercury fulminate). These are the practical, explosive compounds derived from it.
• Fulminate (verb): To express vehement protest, deriving from the same Latin root () and metaphorically evoking an explosive outburst.
• Cyanic acid (noun): The stable isomer of fulminic acid, with the formula HOCN.

Synonyms

• There are no direct common-language synonyms for this precise chemical compound. In highly technical contexts, it may be referred to by its formula (HCNO) or described as the fulminate isomer of HCNO.

Related Phrases/Idioms

• There are no idioms or common phrasal verbs using "fulminic acid." The related verb "to fulminate against" shares an etymological root but is used in a completely different (rhetorical) context.

Noun

1. (CNOH) an unstable acid occurring mainly in the form of explosive salts and esters that is isomeric with cyanic acid