Metal oxides

  • Potassium Thiosulfate: Properties, Uses, Benefits, and Safety Guidelines

What is Potassium Thiosulfate? Is Potassium Thiosulfate safe to use? Are there any alternatives to Potassium Thiosulfate? Where can I buy cheap Potassium Thiosulfate in a small qmount


Potassium thiosulfate (K2S2O3) is a chemical compound belonging to the category of thiosulfates. It is known for its clear, colorless appearance in solution and its ability to dissolve well in water. Potassium thiosulfate is considered relatively stable under most conditions, although it can decompose when exposed to strong acids, releasing sulfur dioxide and potentially hazardous byproducts.

Properties of Potassium Thiosulfate:

  • Chemical Formula: K2S2O3
  • Appearance: Typically available as a colorless crystalline solid or solution.
  • Solubility: Highly soluble in water.

Uses of Potassium Thiosulfate:

  1. Agriculture:

    • Primarily used as a fertilizer in agriculture. It serves as a source of sulfur and potassium for plants, nutrients essential for their growth and development. Potassium thiosulfate is particularly valued in situations where a non-nitrogen supplying potassium source is desired.
  2. Photography:

    • Used in photographic processing as a fixing agent. It helps to remove unreacted silver halide from photographic emulsions after exposure, stabilizing the image.
  3. Water Treatment:

    • Employed in water treatment processes. It acts as a reducing agent that can neutralize oxidative compounds, thus managing odor and helping in the detoxification of certain industrial effluents.
  4. Chemical Synthesis:

    • Used in chemical laboratories for synthetic reactions, particularly as a source of sulfide ion in certain types of chemical synthesis that require mild reducing conditions.
  5. Medicine and Cosmetics:

    • Occasionally found in dermatological applications due to its mild antifungal and antibacterial properties. It can be used in the treatment of certain skin conditions.
  6. Aquaculture:

    • In aquaculture, potassium thiosulfate is sometimes used to neutralize chlorine and chloramine from water sources, making the water safe for aquatic life.

The multifaceted uses of potassium thiosulfate stem from its chemical properties as a good source of potassium and sulfur, along with its capability to function as a reducing agent in various chemical reactions. When handling potassium thiosulfate, standard safety precautions should be observed as it can irritate the skin, eyes, and respiratory system. Proper storage conditions also ensure it remains stable and effective in its applications. 

Formula: K2S2O3 

Molar mass: 190.32 g/mol
Form: white powder
CAS Number: 10294-66-3
EC Number: 233-666-8
Density: 2.37 g/cm³
Synonyms: Potassium thiosulfate, KTS, Thiosulfuric acid (H2S2O3), dipotassium salt, POTASSIUMTHIOSULFATE, dipotassium;dioxido-oxo-sulfanylidene-lambda6-sulfane, Potassium Hyposulfite, Potassium thiosulphate, potassium sulfothioate, DIPOTASSIUM THIOSULFATE

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Potassium Thiosulfate: Properties, Uses, Benefits, and Safety Guidelines

  • Brand: Degussa
  • Availability: 567
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