Sodium thiosulfate: Difference between revisions
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===Secondary=== | ===Secondary=== | ||
* | * Titration of elemental [[iodine]] ({{#Chem: 2Na2S2O3 + I2 → Na2S4O6 + 2NaI // Converts elemental iodine to ionic iodine, clearing the solution}}) | ||
* Neutralization of halide compounds | * Neutralization of halide compounds | ||
* Cooling slurry with water | * Cooling slurry with water | ||
==Natural occurrence== | ==Natural occurrence== | ||
==Hazards== | ==Hazards== | ||
Latest revision as of 17:05, 4 February 2025
| Chemical formula | {{#Chem:Na2S2O3}} |
|---|---|
| OTP appearance | white crystals |
| Molar Mass(g/mol) | 158.11 |
| Density(g/cc) | 1.667 |
| Melting Point(°C) | 48.3 |
| Boiling Point(°C) | 100 |
| Solubility in water(g/L) | 701 |
| Solubility in ethanol(g/L) | non |
| NFPA 704 |  0
1
0
|
Uses
Primary
- Pharm: WHO LEM cyanide antidote (also hydroxocobalamin) Can be delivered by IM injection in the treatment of cyanide poisoning.[1]
Secondary
- Titration of elemental iodine ({{#Chem: 2Na2S2O3 + I2 → Na2S4O6 + 2NaI // Converts elemental iodine to ionic iodine, clearing the solution}})
- Neutralization of halide compounds
- Cooling slurry with water
Natural occurrence
Hazards
Production
Synthesis
Direct
- Boil a solution of sodium hydroxide with sulfur in the correct stochiometric ration, producing (less soluble, 180g/L) sodium sulfide and (very soluble, 701g/L) sodium thiosulfate.
- {{#Chem:6 NaOH(aq) + 4 S { = 100°C } 2 Na2S + Na2S2O3 + 3 H2O }}
- The sulfide biproduct can be converted to thiosulfate as well by combination with sulfur dioxide, recovering some of the initial sulfur.
- {{#Chem: 2Na2S + 3SO2 = 2 Na2S2O3 + S}}
via sodium sulfite
Add sulfur to a solution of sodium sulfite
- {{#Chem: Na2SO3 + S = Na2S2O3 }}
Testing
Purification
Storage
Disposal
See Also
References
- ↑ Bebarta, Vikhyat S.; Brittain, Matthew; Chan, Adriano; Garrett, Norma; et al (2017) "Sodium Nitrite and Sodium Thiosulfate Are Effective Against Acute Cyanide Poisoning When Administered by Intramuscular Injection"
Annals of Emergency Medicine 69(6); pp718-725..
link courtesy Elsevier.