cadmium sulphide
C2Technical/Scientific
Definition
Meaning
A yellow to orange solid chemical compound of cadmium and sulfur with the formula CdS.
A photoconductive semiconductor material used historically in pigments, electronics, photocells, and as a precursor for other cadmium compounds.
Linguistics
Semantic Notes
Primarily refers to a specific chemical material. The term functions as a compound noun where 'cadmium' specifies the type of sulphide. The spelling variant 'cadmium sulfide' is standard in American English contexts.
Dialectal Variation
British vs American Usage
Differences
British English typically uses 'sulphide'; American English uses 'sulfide'. The core term is identical in usage across both variants.
Connotations
No significant connotative difference. Both denote the same chemical compound.
Frequency
Usage frequency is tied entirely to technical, industrial, and scientific contexts in both regions. Extremely rare in general discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
[Compound Noun] + verb (e.g., Cadmium sulphide is used...)[Compound Noun] + preposition + noun (e.g., a layer of cadmium sulphide)Adjective + [Compound Noun] (e.g., synthetic cadmium sulphide)Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Rare; may appear in procurement, supply chain, or regulatory documents for pigments or electronic components.
Academic
Common in chemistry, materials science, physics, and engineering papers discussing semiconductors, photovoltaics, or pigment history.
Everyday
Virtually non-existent.
Technical
The primary register. Used in specifications, research, safety data sheets, and technical manuals.
Examples
By Part of Speech
adjective
British English
- The cadmium-sulphide layer was deposited.
- Cadmium-sulphide-based pigments are restricted.
American English
- The cadmium-sulfide coating is applied.
- Cadmium-sulfide-containing waste requires special handling.
Examples
By CEFR Level
- Cadmium sulphide is a yellow chemical.
- Some artists used paints with cadmium sulphide.
- The historical pigment cadmium yellow was made from cadmium sulphide.
- Due to its toxicity, the use of cadmium sulphide in consumer products is now heavily regulated.
- Researchers are investigating the photoconductive properties of colloidal cadmium sulphide nanoparticles for use in next-generation solar cells.
- The synthesis of high-purity cadmium sulphide requires stringent control over reaction temperature and precursor concentrations.
Learning
Memory Aids
Mnemonic
Think: 'CADets MIxed with SULPHur' to make a yellow solid (CdS). The 'cad' comes from 'cadmium', and 'sulphide' from sulphur.
Conceptual Metaphor
N/A (Highly technical term with little metaphorical extension.)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- May be translated as 'сульфид кадмия' (sul'fid kadmiya). No significant traps; it's a direct technical equivalent.
- Ensure the correct transliteration of 'cadmium' (кадмий) and 'sulphide/sulfide' (сульфид).
Common Mistakes
- Misspelling as 'cadmium sulphate' (a different compound, CdSO₄).
- Incorrectly capitalizing 'sulphide'.
- Using it as a countable noun (e.g., 'a cadmium sulphide') instead of a mass/uncountable noun.
Practice
Quiz
In which field is the term 'cadmium sulphide' MOST commonly used?
FAQ
Frequently Asked Questions
Yes. Cadmium compounds are toxic and carcinogenic. Cadmium sulphide dust is hazardous if inhaled, and the compound poses environmental risks.
Its primary historical use was as a yellow-to-orange pigment (cadmium yellow/orange). Modern uses include semiconductors, photoresistors, thin-film solar cells, and photocatalysis research.
Cadmium sulphide (CdS) is a sulfide compound, yellow and insoluble. Cadmium sulfate (CdSO₄) is a sulfate salt, white and soluble in water. They are chemically distinct.
'Sulphide' is the traditional British English spelling, while 'sulfide' is the standard American English spelling. The chemical symbol (S) and pronunciation remain the same.