NINGBO INNO PHARMCHEM CO.,LTD. is proud to present Sodium Thiosulfate Pentahydrate, a remarkable inorganic compound with the chemical formula Na2S2O3·5H2O and CAS number 10102-17-7. Typically recognized as colorless monoclinic crystals or a white crystalline powder, this odorless substance is highly soluble in water, making it a cornerstone ingredient across a multitude of industries.

Known for its distinct properties, Sodium Thiosulfate Pentahydrate often appears as translucent crystals or a fine white powder. It is efflorescent in dry air and can be deliquescent in moist conditions. The pentahydrate form boasts a molecular weight of 248.18 g/mol, a melting point around 48.5 °C, and exhibits excellent solubility in water, reaching up to 70.1g/100mL at 20°C. While stable under standard conditions, it decomposes at high temperatures, yielding sodium sulfate and sodium polysulfide. Its reaction with dilute acids liberates sulfur and sulfur dioxide, showcasing its versatile chemical behavior.

Beyond its industrial utility, Sodium Thiosulfate Pentahydrate holds significant value in the medical and pharmaceutical sectors. It is widely recognized as a critical antidote for cyanide poisoning, acting as a sulfur donor to facilitate cyanide detoxification. Furthermore, it plays a vital role in treating calciphylaxis, a severe condition involving calcium deposits in blood vessels, by forming soluble complexes with calcium. Its applications extend to mitigating the side effects of cisplatin chemotherapy, preventing hearing loss, and addressing certain fungal infections like ringworm and tinea versicolor. Research also highlights its nephroprotective and antioxidant properties, suggesting broader therapeutic potential.

Historically, one of the most prominent uses of Sodium Thiosulfate Pentahydrate has been in photographic processing. Colloquially known as 'hypo,' it serves as a crucial fixing agent in silver-based photography. Its ability to dissolve silver halides, the light-sensitive components in photographic emulsions, stabilizes the image and renders it insensitive to further light exposure, a vital step in developing film and prints.

In water treatment, this compound is an effective dechlorinating agent. It is extensively used to neutralize chlorine in tap water, making it safe for aquatic life in aquariums and for recreational use in swimming pools and spas. Municipal water treatment plants also employ it to treat backwash water before release, demonstrating its importance in environmental stewardship.

Analytical chemistry relies heavily on Sodium Thiosulfate Pentahydrate. It is a standard reagent in iodometry, a volumetric method used to determine the concentration of various oxidizing agents. Its stoichiometric reaction with iodine, reducing it to iodide while being oxidized to tetrathionate, makes it invaluable for precise measurements, including the estimation of oxygen content in water (Winkler test) and chlorine levels in bleaching agents.

Other industrial applications include its emerging role in gold extraction as a less toxic alternative lixiviant to cyanide, forming strong soluble complexes with gold(I) ions. It is also utilized in chrome leather tanning, for bleaching straw, bone, and ivory, and even as an active component in chemical heating pads and hand warmers.

Industrially, Sodium Thiosulfate Pentahydrate is predominantly synthesized from the liquid waste streams of sodium sulfide or sulfur dye manufacturing processes. Smaller scale production typically involves boiling an aqueous solution of sodium sulfite with sulfur, or by reacting sodium hydroxide with sulfur.

As a trusted manufacturer and supplier, NINGBO INNO PHARMCHEM CO.,LTD. ensures the highest purity and quality of Sodium Thiosulfate Pentahydrate, meeting stringent industry standards. Our commitment to excellence makes us a reliable partner for your chemical sourcing needs. For those looking to buy this essential chemical or inquire about the competitive price for bulk purchase, our team is ready to assist. We offer flexible packaging and timely delivery, catering to diverse requirements across the globe. Partner with NINGBO INNO PHARMCHEM CO.,LTD. for your Sodium Thiosulfate Pentahydrate supply and experience unparalleled service and product integrity.