Remember that use of the drug sodium thiosulfate only after consultation with your doctor. Structure: CAS Number: 7772-98-7 (anhydrous) 10102-17-7 (pentahydrate) Molecular Weight: 158.11 g/mol (anhydrous) 248.18 g/mol (pentahydrate) Chemical Formula: Na2S2O3 (anhydrous) Na2S2O3-5H2O (pentahydrate) 5H 2 O.The solid is an efflorescent (loses water readily) crystalline substance that dissolves well in water. Recommended use and restrictions on use Use of the substance/mixture : For laboratory and manufacturing use only. It is also used with another medicine in the emergency treatment of cyanide poisoning. Another name – hyposulphite of sodium. Uses of Sodium Thiosulfate: It is used to treat cyanide poisoning. It may be given to you for other reasons. If you have an allergy to sodium thiosulfate or any other part of sodium thiosulfate. Sodium thiosulfate may be used to lessen some of the side effects of cisplatin (a cancer medicine). It may be in the form of a clear liquid, a white powder, or a white tablet in the bottom of the bottle. It is a calcium-chelating agent and has many medical uses in removing toxic substances from the body.Depending on the medical condition being treated, the salt can be injected, taken orally, or applied to the skin. Recommended use : Laboratory chemicals Restrictions on use : Not for food, drug or household use 1.3. 5H2O 1.2. Sodium thiosulfate, or sodium thiosulphate, is a colorless, water-soluble salt. It is also used in some vital tests for kidney patients to glean information without doing harm. It is widely used in toxicology, neurology, gynecology and intensive care. What do I need to tell my doctor BEFORE I take Sodium Thiosulfate? Talk with the doctor. Sodium thiosulfate is to be administered only by or under the immediate supervision of your doctor. Sodium thiosulfate is a drug belonging to the group of chelating agents or antidotes.