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The sodium thiosulfate boiling point is around 48C or so. It is a white or colorless crystalline substance that dissolves well in water. It is an important chemical compound used in a wide variety of applications. It is especially useful in gold extraction, photography and medicine. It also plays a role as a dechlorinator in papermaking and is used to prevent the growth of bacteria in water. It is a good alternative to the toxic cyanidation process that is typically used to recover silver from ore.
Sodium thiosulfate reacts in a very rapid manner with aqueous solutions of iodine, which is one of its most common uses. When it is used to perform titrations, it is recommended that the reaction should be performed at pH 5 – 9 in order to minimize acid-accelerated decomposition and acid catalyzed oxidation of iodine to iodate, which can decrease accuracy.
This compound is also used to treat certain rare medical conditions, including calciphylaxis in hemodialysis patients with end-stage kidney disease and cyanide poisoning. It can also be found in table salt and in some alcoholic beverages, although the amounts are very small. It is also used in the preparation of cisplatin, which helps prevent ototoxicity (deafness caused by a side effect of this chemotherapy drug). Sodium thiosulfate interacts with cisplatin to form inactive platinum species and reduce oxidative stress that can damage DNA and lead to cell death. It also increases the levels of glutathione, a natural antioxidant in the body that can neutralize free radicals.