ammonium stearate: meaning, definition, pronunciation and examples
C2/TechnicalTechnical/Scientific
Quick answer
What does “ammonium stearate” mean?
The ammonium salt of stearic acid, a white solid commonly used as a surfactant, emulsifier, and thickener in cosmetics, pharmaceuticals, and industrial applications.
Audio
Pronunciation
Definition
Meaning and Definition
The ammonium salt of stearic acid, a white solid commonly used as a surfactant, emulsifier, and thickener in cosmetics, pharmaceuticals, and industrial applications.
In materials science, it can refer to a precursor or additive in the production of certain ceramics, lubricants, and mold-release agents. In conservation, it may be used in certain cleaning formulations.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Potential minor spelling preference for 'ammonium' as the standard spelling in both variants.
Connotations
Purely technical/scientific in both regions. No cultural or colloquial connotations.
Frequency
Equally low-frequency and confined to specialized chemistry, industrial, and formulation contexts in both dialects.
Grammar
How to Use “ammonium stearate” in a Sentence
[substance] is stabilised by ammonium stearate[product] contains ammonium stearate as a(n) [function]ammonium stearate acts as a [agent] in [system]the addition of ammonium stearate to [mixture]Vocabulary
Collocations
Examples
Examples of “ammonium stearate” in a Sentence
adjective
British English
- The ammonium stearate component was analysed separately.
- We need an ammonium stearate precursor for the reaction.
American English
- The ammonium stearate coating improved flowability.
- An ammonium stearate-based emulsifier was tested.
Usage
Meaning in Context
Business
Used in procurement, specification sheets, and safety data sheets for raw materials in manufacturing.
Academic
Found in chemistry, materials science, and pharmaceutical science papers discussing surfactants, crystallization modifiers, or emulsion stabilizers.
Everyday
Virtually never used. A consumer might encounter it as an ingredient listed on a product label (e.g., cosmetics).
Technical
Core usage. Appears in patents, industrial formulation guides, chemical catalogs, and laboratory procedure manuals.
Vocabulary
Synonyms of “ammonium stearate”
Strong
Neutral
Weak
Watch out
Common Mistakes When Using “ammonium stearate”
- Mispronouncing 'stearate' as /ˈstiː.ə.reɪt/ (it's /ˈstɪə.reɪt/ or /ˈstɪr.eɪt/).
- Confusing it with sodium stearate or magnesium stearate, which have different properties.
- Using 'ammonium stearate' as a countable noun (e.g., 'three ammonium stearates') – it is typically non-count mass noun.
FAQ
Frequently Asked Questions
Yes, in the concentrations typically used, it is generally recognised as safe by regulatory bodies for use as an emulsifier and surfactant. It can cause irritation in some individuals with very sensitive skin.
The main difference is the cation: ammonium (NH4+) vs. sodium (Na+). This affects properties like solubility, thermal stability (ammonium salts can decompose upon heating), and the pH of their solutions.
It is not a common direct food additive. Its related compound, ammonium lauryl sulfate, is used. Stearate salts in food are typically calcium, magnesium, or potassium based. Check local food additive regulations for specific approvals.
It is usually produced by reacting stearic acid (a fatty acid) with ammonium hydroxide (aqueous ammonia), resulting in the salt and water. The solid can then be isolated by cooling or evaporation.
The ammonium salt of stearic acid, a white solid commonly used as a surfactant, emulsifier, and thickener in cosmetics, pharmaceuticals, and industrial applications.
Ammonium stearate is usually technical/scientific in register.
Ammonium stearate: in British English it is pronounced /əˈməʊ.ni.əm ˈstɪə.reɪt/, and in American English it is pronounced /əˈmoʊ.ni.əm ˈstɪr.eɪt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of 'ammonia' for cleaning + 'stearic' from fat (like in steak). It's the 'ammonia version of a fat salt,' used to clean or blend things industrially.
Conceptual Metaphor
A BRIDGE or MEDIATOR (between hydrophobic and hydrophilic phases in emulsions). A LUBRICANT (for processes like powder flow or mold release).
Practice
Quiz
In which of the following products are you LEAST likely to find ammonium stearate as a key ingredient?