barium thiosulfate
C2Formal, Technical, Scientific
Definition
Meaning
A chemical compound with the formula BaS₂O₃, consisting of barium cations and thiosulfate anions. It is a white, crystalline, water-insoluble salt.
A compound primarily of scientific and industrial interest, used in certain pyrotechnic compositions, as a component in specific chemical reactions, and historically in some photographic processes.
Linguistics
Semantic Notes
This term is exclusively a technical noun referring to a specific chemical compound. It has no figurative or metaphorical uses. It is a hyponym of 'chemical compound' and 'salt'.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or usage differences. Spelling of 'sulfate/sulphate' may vary but 'thiosulfate' is the standard spelling for the anion in modern chemistry (IUPAC recommendation).
Connotations
None beyond its technical scientific meaning.
Frequency
Identically rare and confined to specialized chemical, industrial, or academic texts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
[compound] is composed of [elements/anions][agent] reacts to form [barium thiosulfate][barium thiosulfate] precipitates from [solution]Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Not used.
Academic
Used in chemistry textbooks, research papers, and laboratory manuals discussing inorganic synthesis, solubility products, or specific reactions.
Everyday
Virtually never used.
Technical
Used in chemical engineering, industrial chemistry (e.g., pyrotechnics manufacture), and analytical chemistry contexts.
Examples
By CEFR Level
- The precipitate formed was identified as barium thiosulfate.
- Barium thiosulfate is not very soluble in water.
- Upon mixing the solutions, a fine white crystalline solid of barium thiosulfate monohydrate was immediately deposited.
- The researchers characterised the novel complex using barium thiosulfate as a sulfur source in the reaction pathway.
Learning
Memory Aids
Mnemonic
Think: 'Barium' (Ba, heavy element) + 'Thio' (sulfur) + 'Sulfate' (SO4-like group) = A heavy, sulfur-containing salt.
Conceptual Metaphor
None applicable; it is a concrete scientific entity.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- May be mistakenly translated as 'тиосульфат бария' which is correct, but ensure the spelling of 'тиосульфат' is precise and not confused with similar terms like 'сульфат' (sulfate) or 'сульфит' (sulfite).
Common Mistakes
- Misspelling as 'barium thiosulphate' (archaic but understood) or 'barium thiosulfite' (incorrect, as 'thiosulfite' is a different ion). Confusing it with the more common 'barium sulfate' (BaSO₄).
Practice
Quiz
In which field are you MOST likely to encounter the term 'barium thiosulfate'?
FAQ
Frequently Asked Questions
Like many barium compounds, it can be toxic if ingested or inhaled in significant quantities due to the barium ion. It should be handled with appropriate laboratory safety precautions.
Its uses are niche. It has been used in some pyrotechnic compositions (e.g., in certain flares) and historically in photography. It is primarily a compound studied or used in specific chemical syntheses.
In British English: /ˌθaɪ.əʊˈsʌl.feɪt/. In American English: /ˌθaɪ.oʊˈsʌl.feɪt/. The stress is on the 'sulf' syllable.
While 'thiosulphate' is an older spelling, the modern IUPAC-recommended spelling in scientific literature is 'thiosulfate'. Using the 'ph' spelling may be considered archaic but is generally understood.