Used as an antidote for cyanide poisoning, administered intravenously to convert cyanide into less toxic thiocyanate, which is then excreted via urine.

Employed in water treatment to neutralize chlorine and chloramines in aquariums, swimming pools, and wastewater.

Commonly used in photography as a fixing agent to dissolve unexposed silver halides from photographic film and paper.

Applied in analytical chemistry for iodometric titrations, where it reacts with iodine to determine concentration of oxidizing agents.

Utilized in medicine to treat calciphylaxis in patients with end-stage kidney disease, helping to reduce calcium buildup in blood vessels.

In dermatology, used in combination with phototherapy for certain cases of psoriasis.

Used in microbiology labs to provide a sulfur source for bacterial growth in culture media.

Acts as a reducing agent in various industrial processes, including bleaching textiles (to reduce residual chlorine and prevent fiber damage) and paper pulp.