sodium hydrosulfite: meaning, definition, pronunciation and examples
Very LowTechnical / Scientific / Industrial
Quick answer
What does “sodium hydrosulfite” mean?
A white crystalline chemical compound (Na₂S₂O₄) used as a reducing agent and bleach.
Audio
Pronunciation
Definition
Meaning and Definition
A white crystalline chemical compound (Na₂S₂O₄) used as a reducing agent and bleach.
An industrial chemical employed in various processes including textile bleaching, water treatment, and as a food additive/preservative (E222). It decomposes in water to release sulfur dioxide.
Dialectal Variation
British vs American Usage
Differences
Primarily spelling: 'sodium hydrosulphite' (UK) vs. 'sodium hydrosulfite' (US). The chemical synonym 'sodium dithionite' is spelled identically.
Connotations
None beyond spelling variation; the term is purely technical.
Frequency
Equal technical frequency in both varieties, though UK sources will predominantly use the 'ph' spelling.
Grammar
How to Use “sodium hydrosulfite” in a Sentence
Sodium hydrosulfite is used to VERB (e.g., bleach, reduce, strip)The process involves the addition of sodium hydrosulfiteVocabulary
Collocations
Examples
Examples of “sodium hydrosulfite” in a Sentence
verb
British English
- The fabric was hydrosulphited to remove the stubborn dye.
- We need to hydrosulphite the solution before the next stage.
American English
- The pulp is hydrosulfited to achieve brightness.
- They hydrosulfite the mixture under an inert atmosphere.
adjective
British English
- The hydrosulphite bleaching process is highly effective.
- A hydrosulphite reduction step is critical.
American English
- The hydrosulfite concentration must be monitored.
- Use a hydrosulfite solution for this test.
Usage
Meaning in Context
Business
Used in procurement and supply chain contexts for industries like textiles, paper, or food processing.
Academic
Discussed in chemistry papers, environmental science studies on wastewater treatment, and food technology journals.
Everyday
Virtually never used in everyday conversation.
Technical
Standard term in chemical engineering, industrial manufacturing, laboratory procedures, and material safety data sheets (MSDS).
Vocabulary
Synonyms of “sodium hydrosulfite”
Vocabulary
Antonyms of “sodium hydrosulfite”
Watch out
Common Mistakes When Using “sodium hydrosulfite”
- Misspelling as 'sodium hydrosulphate' (confusion with sulfate).
- Pronouncing the '-ite' as a homophone for 'light' instead of 'fight'.
- Assuming it is safe for casual handling (it is a hazardous chemical).
FAQ
Frequently Asked Questions
It is a specific type of chemical bleaching and reducing agent, not the same as common household chlorine bleach (sodium hypochlorite).
No, it is an industrial chemical with specific hazards and requires proper handling, ventilation, and safety equipment.
It follows the general English spelling convention: 'sulfur' and related compounds use 'f' in American English and 'ph' in British English (sulphur).
For the sodium salt, they refer to the same compound (Na₂S₂O₄). 'Sodium dithionite' is the systematic IUPAC name, while 'sodium hydrosulfite' is a traditional, commercially common name.
A white crystalline chemical compound (Na₂S₂O₄) used as a reducing agent and bleach.
Sodium hydrosulfite is usually technical / scientific / industrial in register.
Sodium hydrosulfite: in British English it is pronounced /ˌsəʊ.di.əm ˌhaɪ.drəʊˈsʌl.faɪt/, and in American English it is pronounced /ˌsoʊ.di.əm ˌhaɪ.droʊˈsʌl.faɪt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: SODIUM (like table salt, Na) HYDRO (water-related) SULFITE (contains sulfur). It's a sulfur-based sodium salt that works in water.
Practice
Quiz
What is the primary hazard associated with sodium hydrosulfite?