quinic acid
C2Technical/Scientific
Definition
Meaning
A crystalline organic acid naturally found in cinchona bark, coffee beans, and some fruits.
In chemistry, a specific stereoisomer of 1,3,4,5-tetrahydroxycyclohexanecarboxylic acid, which serves as a biosynthetic precursor to aromatic compounds and is studied for its antioxidant properties.
Linguistics
Semantic Notes
Primarily used in chemistry, biochemistry, and food science. It is not a common term in general conversation. The term is specific and refers to a single, well-defined chemical compound.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of related terms follows regional norms (e.g., 'analyse' vs. 'analyze').
Connotations
Purely technical/connotatively neutral in both regions.
Frequency
Equally low-frequency and specialized in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
[Substance] contains quinic acidQuinic acid is found in [source]The synthesis of quinic acidVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Rarely used; may appear in technical specifications for food, beverage, or supplement industries.
Academic
Common in chemistry, biochemistry, and phytochemistry research papers and textbooks.
Everyday
Virtually never used in everyday conversation.
Technical
The primary context of use. Refers to a specific metabolite and biochemical precursor.
Examples
By Part of Speech
adjective
British English
- The quinic acid pathway
- quinic acid derivatives
American English
- The quinic acid pathway
- quinic acid derivatives
Examples
By CEFR Level
- Coffee beans are a natural source of quinic acid.
- Scientists can measure the quinic acid content in plants.
- The study focused on the enzymatic conversion of quinic acid into shikimic acid.
- High-performance liquid chromatography was used to isolate quinic acid from the plant extract.
Learning
Memory Aids
Mnemonic
Think 'Quinine' (from cinchona bark) + 'acid'. Quinic acid is chemically related to quinine and found in the same source.
Conceptual Metaphor
BUILDING BLOCK (e.g., 'Quinic acid is a key building block in the shikimate pathway.')
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation. Use established term 'хинная кислота'. Do not confuse with 'кининовая кислота' (kinin acid) or 'хинолиновая кислота' (quinolinic acid).
Common Mistakes
- Misspelling as 'quinine acid' (quinine is a different, nitrogen-containing alkaloid).
- Incorrect pluralisation ('quinic acids' – it is a singular compound name).
- Mispronunciation as /ˈkwaɪnɪk/ instead of /ˈkwɪnɪk/.
Practice
Quiz
In which field is the term 'quinic acid' most commonly used?
FAQ
Frequently Asked Questions
No. Quinic acid is a carboxylic acid found in plants. Quinine is a complex alkaloid containing nitrogen, famously used as an antimalarial drug. They are chemically distinct but share a common botanical origin (cinchona bark).
Yes. Quinic acid is naturally present in coffee beans, cranberries, apples, peaches, and some other fruits, contributing to their acidity and flavour profile.
It is a key intermediate in the shikimate pathway, a metabolic route in plants and microorganisms that produces the aromatic amino acids phenylalanine, tyrosine, and tryptophan.
As a naturally occurring compound in many common foods, it is generally regarded as safe. Isolated or concentrated forms are studied for potential bioactivity but should be handled as laboratory chemicals.