Photographers' Formulary 1lbs Anhydrous Sodium Thiosulfate

SKU: PYSTHA1LB MFR: 10-1370 1LB
$11.95
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Key Features

  • Achieve archival prints with our premium Sodium Thiosulfate for lasting image quality.
  • Use as a fixer in film development; this black and white chemical ensures chemical stability.
  • Perfect for creating your own custom fixing baths, tailoring to your specific needs.
  • Anhydrous Sodium Thiosulfate effectively removes residual silver halide for clear images.
  • Control tonal range precisely by adjusting concentration in your black and white process.
  • Get consistent grain control in your film and paper development with this fixer.
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Special Order?Estimated to Ship: 09/06/2025

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Photographers' Formulary Sodium Thiosulfate Specifications

  • Synonyms

    Antichlor
    Hypo
    Hyposulfite of soda
    Sodium hyposulfite
    Sodium subsulfite
    Sodium thiosulfate, pentahydrate
    Thiosulfuric acid, disodium salt, pentahydrate

  • Appearance

    Large white monoclinic, colorless crystals and powder
    Odorless

  • Uses

    In preparation of fixing baths
    Ingredient in various reducers

  • Chemical Formula

    Na2S2O3.5H2O

  • Weight

    1lbs (0.45kg)

  • UPC Code

    675152137036

About Photographers' Formulary Sodium Thiosulfate

An essential component in various chemical applications, our 1lb Anhydrous Sodium Thiosulfate is a versatile product with a multitude of uses. It is commonly utilized in the preparation of fixing baths, serving as a key ingredient in the process. Additionally, it is a crucial component in a variety of reducers, demonstrating its wide-ranging functionality.

This product is available in two forms: anhydrous and crystalline. It's important to note that the two forms have distinct properties when dissolved. Crystalline Sodium Thiosulfate, when mixed with water, significantly lowers the temperature of the solution. On the other hand, our Anhydrous Sodium Thiosulfate maintains the water's temperature, making it a more stable choice for certain applications.

When using the crystalline form, it is recommended to start with water at a minimum temperature of 90°F (32°C) to ensure optimal dissolution. However, if you're substituting crystalline with our anhydrous form, use 64% of the anhydrous salt for best results.

Whether you're a professional chemist or a hobbyist, our 1lb Anhydrous Sodium Thiosulfate offers reliability and versatility for your chemical needs.

Photographers' Formulary Sodium Thiosulfate Features

  • Versatile 1lb Anhydrous Sodium Thiosulfate for various chemical applications
  • Ideal for preparation of fixing baths and as an ingredient in reducers
  • Maintains water temperature when dissolved, unlike its crystalline counterpart
  • Suitable for professional chemists and hobbyists alike
  • Provides a stable alternative to crystalline Sodium Thiosulfate
  • Use 64% of this anhydrous salt as an effective substitute for crystalline form

Key Features

  • Achieve archival prints with our premium Sodium Thiosulfate for lasting image quality.
  • Use as a fixer in film development; this black and white chemical ensures chemical stability.
  • Perfect for creating your own custom fixing baths, tailoring to your specific needs.
  • Anhydrous Sodium Thiosulfate effectively removes residual silver halide for clear images.
  • Control tonal range precisely by adjusting concentration in your black and white process.
  • Get consistent grain control in your film and paper development with this fixer.