acetanilide
C2 (Very Low Frequency / Specialist Term)Technical/Scientific
Definition
Meaning
A white crystalline compound derived from aniline and acetic acid, formerly used as an analgesic and antipyretic drug, now primarily of interest in chemical and pharmaceutical contexts.
In historical pharmacology, a fever-reducing and pain-relieving agent. In modern contexts, a reference compound in organic chemistry synthesis and a case study in drug development due to its toxic metabolite issues leading to its medical discontinuation.
Linguistics
Semantic Notes
The term is almost exclusively used in chemistry, pharmacology, and the history of medicine. Its meaning is highly specific and non-figurative. It belongs to a class of compounds called anilides.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or spelling. Pronunciations may vary slightly (see IPA). The compound's history and chemical role are identical in both varieties.
Connotations
Connotes obsolete pharmacology, early synthetic drugs, and chemical intermediates. May evoke discussions on drug safety (as it causes methemoglobinemia).
Frequency
Extremely rare in general discourse. Frequency is identical in UK and US English, confined to specialist texts.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] synthesises acetanilide from aniline.[Subject] is a derivative of acetanilide.The use of acetanilide [verb, e.g., declined, was discontinued].Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Not applicable.
Academic
Common in papers on the history of pharmacology, organic synthesis pathways, and studies of drug metabolism and toxicity.
Everyday
Virtually never used.
Technical
Used as a specific compound name in chemical formulas, safety data sheets, and pharmaceutical history.
Examples
By Part of Speech
adjective
British English
- The acetanilide moiety is central to the structure.
- They studied acetanilide toxicity.
American English
- The acetanilide derivative showed reduced side effects.
- An acetanilide-based analgesic.
Examples
By CEFR Level
- Acetanilide was one of the first synthetic fever-reducing drugs.
- The chemist produced acetanilide in the laboratory.
- Despite its efficacy as an antipyretic, acetanilide was withdrawn from therapeutic use due to the formation of a toxic aniline metabolite.
- The synthesis involves the acetylation of aniline to yield acetanilide.
Learning
Memory Aids
Mnemonic
Think: 'ACEtic acid + ANILINE' combined make 'acetanilIDE'. It's an 'amide' derived from aniline.
Conceptual Metaphor
A CAUTIONARY TALE IN CHEMISTRY: Represents the concept of a pioneering synthetic remedy whose hidden dangers led to its replacement, illustrating progress in medicinal safety.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with similar-sounding general terms like 'ацетил' (acetyl). The direct equivalent is 'ацетанилид'.
- It is a very specific term, not a category of drugs.
Common Mistakes
- Misspelling as 'acetanilid' (although this is an accepted variant).
- Confusing it with 'acetaminophen' (paracetamol), a related but different and safer drug.
- Using it in a non-scientific context.
Practice
Quiz
Why is acetanilide historically significant but no longer used medicinally?
FAQ
Frequently Asked Questions
No, it has been obsolete in medicine for decades due to its toxicity, notably its potential to cause methemoglobinemia (a blood disorder). It is now primarily of historical and chemical interest.
Its primary use is as an intermediate in organic chemical synthesis and as a standard compound in laboratory and educational settings to demonstrate certain chemical reactions and principles.
Acetanilide's metabolite, paracetamol (acetaminophen), was found to be the active, safer component. Paracetamol replaced acetanilide and related compounds for analgesic and antipyretic use.
Absolutely not. It is not an approved or marketed drug in any modern pharmacopeia. You would only encounter it in a chemical supplier's catalogue or historical texts.