Sodium pyrosulfate is widely used in analytical chemistry as a flux to fuse and decompose difficultly soluble inorganic materials, such as silicates, ores, and minerals, enabling their dissolution for analysis.

Used in metal surface treatment processes, particularly in pickling and cleaning of steel, where it helps remove oxides and scale.

It serves as a flux in metallurgical operations, lowering the melting point of mixtures and facilitating slag removal.

Commonly applied in the production of dyes and pigments as a sulfonating agent.

Utilized in water treatment systems to adjust pH and, upon heating, as a source of sulfur dioxide to remove residual chlorine.

Employed in industrial cleaning compounds, paper, and textile processing for pH control and bleaching steps due to its acidic nature when dissolved in water.