Uses of Sodium Thiosulphate Pentahydrate

Titration Agent:

It is commonly used in iodometric titrations to determine the concentration of certain substances, particularly for quantifying iodine and chlorine.

Chemical Analysis:

It serves as a reagent for various analytical procedures, including the analysis of metal ions and the determination of dissolved oxygen in water samples.

Photographic Processing:

It is used as a fixer to dissolve unreacted silver halides from photographic film or paper, ensuring the stability and durability of the developed image.

Gold Extraction:

It acts as a leaching agent in the extraction of gold from ores, providing an environmentally friendly alternative to cyanide.

Starch Indicator:

In combination with starch, it helps to visualize the endpoint in iodometric titrations, turning blue-black in the presence of iodine.