zinc stearate
Very Low FrequencyTechnical / Scientific
Definition
Meaning
A white, hydrophobic powder that is the zinc salt of stearic acid, primarily used as a lubricant and release agent.
In industrial and pharmaceutical contexts, it functions as a flow agent in powder mixes, a cosmetic ingredient for texture, and a drying agent in paints and coatings.
Linguistics
Semantic Notes
The term refers exclusively to a specific chemical compound. It is not used metaphorically. It is a mass noun and typically uncountable.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Pronunciation differs slightly (see IPA).
Connotations
Identical technical connotations in both varieties.
Frequency
Equally rare outside of chemistry, manufacturing, and pharmaceutical contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject: process/person] uses zinc stearate as [object: lubricant/agent][Subject: product] is coated with zinc stearate[Subject: zinc stearate] acts as a [object: flow aid]Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Discussed in procurement, manufacturing specifications, and safety data sheets.
Academic
Used in chemistry, materials science, and pharmaceutical research papers.
Everyday
Virtually never used in everyday conversation.
Technical
Standard term in chemical engineering, cosmetics formulation, polymer processing, and paint manufacturing.
Examples
By Part of Speech
adjective
British English
- The zinc stearate coating prevented adhesion.
American English
- The zinc stearate layer provides water resistance.
Examples
By CEFR Level
- This powder contains zinc stearate.
- The manufacturer added zinc stearate to the mixture to improve its flow properties.
- In tablet compression, a small percentage of zinc stearate is routinely incorporated as an anti-adherent and lubricant to ensure smooth ejection from the die.
Learning
Memory Aids
Mnemonic
Think: 'Zinc' the metal + 'Stearate' from 'stearic acid' (a fat). It's a metallic soap used to make things slippery.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation. The correct term is 'стеарат цинка' (stearat tsinka), maintaining the chemical naming order.
Common Mistakes
- Incorrect pluralisation (*zinc stearates*).
- Mispronouncing 'stearate' as /ˈstiː.reɪt/ (it's /ˈstɪə.reɪt/ or /ˈstɪr.eɪt/).
- Confusing it with 'zinc oxide'.
Practice
Quiz
In which of the following products are you LEAST likely to find zinc stearate?
FAQ
Frequently Asked Questions
In the low concentrations used as a texture enhancer or lubricant, it is generally recognised as safe by regulatory bodies.
It is almost always a fine, white, fluffy powder that is hydrophobic (repels water).
No, it is insoluble in water, alcohol, and ether, but it dissolves in acids when heated.
Its primary use is as a release agent and lubricant in plastics, rubber, and concrete moulding to prevent materials from sticking to surfaces.