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Sodium thiosulfate (sodium thiosulphate) is an inorganic compound with the formula Na 2 S 2 O 3 ·(H 2 O) x. Typically it is available as the white or colorless pentahydrate (x = 5), which is a white solid that dissolves well in water.
Thiosulfate (IUPAC-recommended spelling; sometimes thiosulphate in British English) is an oxyanion of sulfur with the chemical formula S 2 O 2− 3.Thiosulfate also refers to the compounds containing this anion, which are the salts of thiosulfuric acid, such as sodium thiosulfate Na 2 S 2 O 3 and ammonium thiosulfate (NH 4) 2 S 2 O 3.
Molar mass: 68.9953 g/mol ... Nitrite has the E number E250. Potassium ... Sodium nitrite is used as a medication together with sodium thiosulfate to treat cyanide ...
CAS Number. 13686-28-7 ... Molar mass: 114.13 g·mol −1 Melting point: decomposes below 0 °C ... Sodium thiosulfate; Potassium thiosulfate;
Arsenic trioxide for making sodium arsenite solution for standardisation of sodium periodate solution (until Ph. Eur. 3, Appendix 2001 also for iodine and cerium(IV) sulfate solutions, since Ph. Eur. 4, 2002 standardised by sodium thiosulfate)
Thus, solutions of sodium dithionite cannot be stored for a long period of time. [3] Anhydrous sodium dithionite decomposes to sodium sulfate and sulfur dioxide above 90 °C in the air. In absence of air, it decomposes quickly above 150 °C to sodium sulfite, sodium thiosulfate, sulfur dioxide and trace amount of sulfur.
The agent used is sodium thiosulfate, and reacts according to the following equation: [2] AgX(s) + 2 Na 2 S 2 O 3 (aq) → Na 3 [Ag(S 2 O 3) 2](aq) + NaX(aq) An indefinite number of positive prints can be generated from the negative by passing light through it and undertaking the same steps outlined above. [2]
CAS Number. 75-05-8 ... Molar mass: 41.053 g·mol −1 ... sodium nitrite, and sodium thiosulfate among the most commonly used emergency treatments.