Sodium hydrogen sulphide, also known as sodium bisulfide, sodium hydrosulfide, or sodium sulfhydrate, is a highly alkaline solution with a pH of 11.5 to 12.5. It is yellow to dark green in colour. Sodium hydrosulfide is manufactured by scrubbing hydrogen sulfide from outlet streams with sodium hydroxide. The NaSH solution is filtered and sold as a 44% to 46% solution. It is concentrated through evaporation to form a flake material of 70% to 72% sodium hydrogen sulphide. It reacts with all acids by releasing a highly toxic hydro sulphide gas. The NaSH solution reacts with oxidizing agents which helps precipitate the elemental sulphur. It is stable under ambient pressure and temperature conditions. It is used in various applications such as kraft pulping, copper minerals flotation, chemicals and dyes, leather processing, and rayon & cellophane desulfurization.
Sodium Hydrogen Sulfide Market: Drivers and Restraints, Segmentation
Sodium hydrogen sulfide is a low-cost alternative to chemicals such as sodium sulphate when it comes to kraft pulping. Low grade sodium hydrogen sulphide is preferably used for this purpose since it is a by-product from refineries and requires no prior treatment. Therefore, the emerging pulping industry is expected to drive the sodium hydrogen sulfide market. However, due to the low pricing and an oversupply situation in copper mineral flotation, the demand for sodium hydrogen sulfide in this sector is estimated to diminish. Also, the usage of sodium hydrogen sulphide in leather tanning been continually declining in the last few years owing to the relocation of tanneries outside the U.S. Environmental concerns associated with sodium hydrogen sulphide are predicted to hamper the expansion of this market too.
The sodium hydrogen sulfide market could be segmented based on forms such as: Solid fused form, Flakes, Aqueous solution
Sodium hydrogen sulfide is mainly solid in nature but is preferred to be used as an aqueous solution due to its hygroscopic nature. Since it is more stable in its solution form, it is also transported as a liquid. In its solid fused form, it is packed and transported in iron drums, whereas the flakes are packed in polyethylene bags. The liquid solution (up to 72%) is delivered in tank wagons.
In terms of end-users, the sodium hydrogen sulfide market could be divided into the following categories: Mining, Leather, Pulp & Paper, Metal extraction, Textiles, Chemical processing
Sodium hydrogen sulphide is used a chemical intermediate in the manufacturing of thio-compounds such as sodium thiosulfate, thio & dithio benzoic acids, and thioamides. It is also employed as a finishing agent in leather tanning and glass making applications.
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