Sodium sulfide hydrate is used as an oxygen scavenger in water treatment, bleaching agent in textile industry, desulfurising and as a dechlorinating agent and in leather industry, sulfonation and sulfomethylation agent in chemical industry. It is involved in the production of rubber chemicals and sulfur dyes. It is also used to prepare 3-nitroaniline from 1,3-dinitrobenzene and thioethers from alkyl halide. It plays an important role in other applications such as ore flotation, oil recovery, making dyes, and detergent. In addition, it is used in pulp and paper industry in the Kraft process.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.