Phrase guide

sodium thiosulfate

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

An inorganic compound that is typically available as the pentahydrate, Na2S2O3·5H2O. It is used in iodometry, photographic processing, gold extraction, etc.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: hyposulfite of soda, hypo

Antonyms: none provided

2

noun

Meaning 2

a compound used as a fixing agent in photographic developing

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: hypo, sodium thiosulphate

Antonyms: none provided

Broader terms: fixing agent, fixer

History

Etymology

No etymology was provided for this word.

Across languages

Translations

11 source translations are retained for this English entry.

  • Chinese Mandarin: 硫代硫酸鈉 /硫代硫酸钠 (liúdài liúsuānnà) — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • French: thiosulfate de sodium — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • German: Natriumthiosulfat — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • German: Fixiersalz — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Hungarian: nátrium-tioszulfát — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Hungarian: fixírsó — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Hungarian: széksó — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Italian: tiosolfato di sodio — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Polish: antychlor — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Polish: tiosiarczan sodu — inorganic compound used in iodometry, photographic processing, gold extraction, etc.
  • Spanish: tiosulfato de sodio — inorganic compound used in iodometry, photographic processing, gold extraction, etc.