ammonium carbonate: meaning, definition, pronunciation and examples
LowTechnical/Chemical
Quick answer
What does “ammonium carbonate” mean?
A white, crystalline inorganic salt with the chemical formula (NH₄)₂CO₃, which decomposes into ammonia, carbon dioxide, and water, releasing a strong ammonia smell.
Audio
Pronunciation
Definition
Meaning and Definition
A white, crystalline inorganic salt with the chemical formula (NH₄)₂CO₃, which decomposes into ammonia, carbon dioxide, and water, releasing a strong ammonia smell.
Primarily used as a leavening agent in traditional baking (e.g., in some biscuits and crackers), a smelling salt, a mordant in dyeing, and in certain fire-extinguishing compounds. It is unstable and must be stored in airtight containers.
Dialectal Variation
British vs American Usage
Differences
UK English may use the term 'Volatile Salts' or 'Sal Volatile' more commonly in non-technical contexts. The compound is largely obsolete in modern home baking in both regions but retains niche use.
Connotations
Strongly associated with chemistry, old-fashioned baking, and medical/first aid (smelling salts).
Frequency
Extremely low in general discourse. Frequency is essentially identical between UK and US, limited to specific technical and historical contexts.
Grammar
How to Use “ammonium carbonate” in a Sentence
[ammonium carbonate] + [verb: decomposes, releases, acts as][use/ add] + [ammonium carbonate][solution/ powder] + [of ammonium carbonate]Vocabulary
Collocations
Examples
Examples of “ammonium carbonate” in a Sentence
verb
British English
- The recipe instructs you to gently heat the mixture to drive off the residual ammonia after the ammonium carbonate has decomposed.
American English
- The compound will fully decompose if exposed to humid air.
Usage
Meaning in Context
Business
Found in supply catalogs for chemical reagents or niche baking suppliers.
Academic
Common in chemistry textbooks, historical food science papers, and material safety data sheets (MSDS).
Everyday
Virtually never used. An older person might recall it from traditional recipes.
Technical
Used precisely in chemical formulations, discussions of inorganic salts, and historical industrial processes.
Vocabulary
Synonyms of “ammonium carbonate”
Strong
Neutral
Weak
Watch out
Common Mistakes When Using “ammonium carbonate”
- Pronouncing 'ammonium' with stress on the second syllable (/æˈmoʊ.ni.əm/). Correct stress is on the third syllable.
- Confusing it with ammonium bicarbonate or ammonium hydroxide.
- Using it in modern recipes without understanding its stronger leavening power and need for complete bake-out to avoid ammonia taste.
FAQ
Frequently Asked Questions
In baked goods, yes, as it decomposes completely during baking. The residual ammonia smell dissipates. It is not eaten directly as it is irritating and toxic in its raw form.
Ammonium carbonate decomposes with heat alone, producing ammonia gas. Baking powder requires moisture and heat, reacting an acid and a carbonate (like sodium bicarbonate) to produce carbon dioxide. Ammonia gas can impart a specific texture and flavour.
It readily decomposes at room temperature, especially in humid air, releasing ammonia gas which has a very pungent odour.
It can be found at specialised chemical suppliers, some pharmacy or compounding shops (as 'smelling salts'), or through online retailers specialising in historical baking ingredients.
A white, crystalline inorganic salt with the chemical formula (NH₄)₂CO₃, which decomposes into ammonia, carbon dioxide, and water, releasing a strong ammonia smell.
Ammonium carbonate is usually technical/chemical in register.
Ammonium carbonate: in British English it is pronounced /əˌməʊ.ni.əm ˈkɑː.bə.neɪt/, and in American English it is pronounced /əˌmoʊ.ni.əm ˈkɑːr.bə.neɪt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of AMMonia coming from OmiUM CARBONATE. It's the carbonate salt that smells of ammonia.
Conceptual Metaphor
DECOMPOSITION AS RELEASE (It decomposes, releasing its active components).
Practice
Quiz
What is a primary historical use of ammonium carbonate outside of chemistry?