calcium arsenate
Low/Very LowTechnical, Scientific
Definition
Meaning
A white, crystalline, inorganic compound with the chemical formula Ca3(AsO4)2, used primarily as an insecticide and rodenticide.
A chemical compound once widely used in agriculture as a potent pesticide, but now heavily regulated or banned in many countries due to its high toxicity and environmental persistence as an arsenic derivative.
Linguistics
Semantic Notes
The term refers specifically to the compound, not to mixtures containing it. It carries a strong connotation of toxicity and historical agricultural use. It is a hyponym of 'arsenate' and 'pesticide'.
Dialectal Variation
British vs American Usage
Differences
No major lexical differences. Spelling is identical. The regulatory status and historical usage contexts are virtually identical in both regions.
Connotations
Strongly associated with outdated, hazardous agricultural practices and environmental contamination in both varieties.
Frequency
Extremely low in everyday language; appears almost exclusively in historical, regulatory, environmental science, or toxicology contexts in both BrE and AmE.
Vocabulary
Collocations
Grammar
Valency Patterns
[calcium arsenate] was used to [VERB] [NOUN]The [NOUN] contained [calcium arsenate][calcium arsenate] contaminationVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None. It is a technical term not used idiomatically.”
Usage
Context Usage
Business
Mentioned in contexts of environmental liability, historical practices, or chemical regulation compliance.
Academic
Used in papers on environmental history, toxicology, soil chemistry, and the history of agriculture.
Everyday
Virtually never used. A layperson might encounter it in news about old orchard clean-ups or Superfund sites.
Technical
Precise term in chemistry, environmental science, and hazardous materials management.
Examples
By Part of Speech
verb
British English
- The orchard was treated with calcium arsenate.
American English
- They applied calcium arsenate to the cotton fields.
adjective
British English
- Calcium-arsenate contamination remains a concern.
American English
- The calcium-arsenate residue was tested.
Examples
By CEFR Level
- Calcium arsenate is a chemical.
- Calcium arsenate is a very toxic pesticide.
- Due to its toxicity, calcium arsenate has been banned in many countries.
- The persistent soil contamination from historical calcium arsenate applications complicates land redevelopment.
Learning
Memory Aids
Mnemonic
Think: CALCIUM (like in bones/chalk) + ARSENATE (from arsenic, a famous poison). A 'chalky poison' used on crops.
Conceptual Metaphor
TOXICITY IS A LEGACY/CONTAMINANT (e.g., 'the legacy of calcium arsenate use').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'calcium' as 'кальций' and 'arsenate' as 'арсенат' separately unless in a strictly chemical context. The established Russian term is 'арсенат кальция'.
- Avoid confusing it with 'мышьяк' (arsenic) alone; it is a specific compound.
Common Mistakes
- Mispronouncing 'arsenate' as /ˈɑːrseɪnət/ (like 'arsenic'). Correct is /ˈɑːrsəneɪt/.
- Using it as a general term for any pesticide.
- Incorrect plural: 'calcium arsenates' (usually non-count for the specific compound).
Practice
Quiz
What is the primary reason calcium arsenate is no longer widely used?
FAQ
Frequently Asked Questions
In most countries, its use is heavily restricted or completely banned due to the toxicity of arsenic.
It is typically a white or colourless crystalline powder.
It was primarily used as an insecticide on crops like cotton, fruit trees, and potatoes, and as a rodenticide.
Because its historical use left persistent residues in soil, posing ongoing environmental and health risks, especially in old agricultural areas.