Sodium thiosulfate
- CAS No.
- 7772-98-7
- Chemical Name:
- Sodium thiosulfate
- Synonyms
- SODIUM THIOSULPHATE;Thiosulfate;SODIUM HYPOSULFITE;HYPO;Sodium Thiosulfite;Sodium Thiosulfat;Anhydrous sodium thiosulfate;Sodium Hyposulfite Anhydrous;'HYPO';Detoxol
- CBNumber:
- CB4232650
- Molecular Formula:
- Na2O3S2
- Molecular Weight:
- 158.11
- MOL File:
- 7772-98-7.mol
- MSDS File:
- SDS
- Modify Date:
- 2024/5/24 15:44:31
| Melting point | 48°C |
|---|---|
| Boiling point | 100°C |
| Density | 1.01 g/mL at 25 °C |
| storage temp. | Store at +5°C to +30°C. |
| solubility | Immiscible with alcohol. |
| form | Solid |
| Specific Gravity | 1.667 |
| color | White |
| PH | 6.0-8.5 (25℃, 50mg/mL in H2O) |
| Water Solubility | Soluble in water. Insoluble in alcohol. |
| Sensitive | Hygroscopic |
| Merck | 14,8694 |
| Stability | Stable. Incompatible with strong acids, strong oxidizing agents, iodine, mercury. |
| InChIKey | AKHNMLFCWUSKQB-UHFFFAOYSA-L |
| LogP | -0.428 (est) |
| CAS DataBase Reference | 7772-98-7(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium thiosulfate (7772-98-7) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H335-H315-H319 | |||||||||
| Precautionary statements | P264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362 | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 24/25-23-36-26 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | XN6476000 | |||||||||
| F | 3 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 28323000 | |||||||||
| Toxicity | LD50 orally in Rabbit: > 5000 mg/kg | |||||||||
| NFPA 704 |
|
Sodium thiosulfate price More Price(27)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 909173 | Sodium thiosulfate free-flowing, Redi-Dri?, ReagentPlus?, 99% | 7772-98-7 | 250G | ₹5542.4 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 909173 | Sodium thiosulfate free-flowing, Redi-Dri?, ReagentPlus?, 99% | 7772-98-7 | 500G | ₹7555.85 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | PHR2690 | Sodium thiosulfate Pharmaceutical Secondary Standard; Certified Reference Material, certified reference material, pharmaceutical secondary standard, pkg of 2?g | 7772-98-7 | 2G | ₹16995.25 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 909173 | Sodium thiosulfate free-flowing, Redi-Dri?, ReagentPlus?, 99% | 7772-98-7 | 1KG | ₹12741.03 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 72049 | Sodium thiosulfate purum p.a., anhydrous, ≥98.0% (RT) | 7772-98-7 | 250G | ₹1980.98 | 2022-06-14 | Buy |
Sodium thiosulfate Chemical Properties,Uses,Production
Chemical Properties
Sodium thiosulfate, Na2S203·5H20, also known as sodium hyposulfite, hypo,andsodium subsulfite, is a white crystalline solid that has a melting point of 48 °C(118 °F). Water soluble,it is used as a fixing agent for photographic films, plates, and papers. Sodium thiosulfate is used in medicine, as a germicide, in manufacturing leather, as a mordant in dyeing, and for extracting silver from ore.
Physical properties
Anhydrous thiosulfate is a white powder; soluble in water; insoluble in ethanol.
Sodium pentahydrate is a colorless, odorless, crystalline solid; density 1.69 g/cm3; decomposes around 50°C; effloresces in dry air above 33°C; very soluble in water and oil of turpentine; insoluble in ethanol.
Uses
Sodium thiosulfate is a common analytical reagent used in iodometric titration to analyze chlorine, bromine, and sulfide. Other uses are in bleaching paper pulp, bleaching straw, ivory, and bones, for removing chlorine from solutions, silver extraction from its ores, a mordant in dyeing and printing textiles, and as an antidote to cyanide poisoning.
Another major application is in photography, where it is used as a fixer to dissolve unchanged silver salts from exposed negatives.
Sodium Thiosulfate is used primarily as a medicament against cyanide poisoning, able to convert cyanide into thiocyanate, a reaction which is catalyzed by the enzyme Rhodanese. Antioxidant.
Preparation
Sodium thiosulfate is a common reducing agent. It reduces iodine to iodide anion forming sodium tetrathionate. This reaction is utilized in the so-called iodometric titration: 2S2O32ˉ + I2 → S4O62ˉ + 2Iˉ
Sodium thiosulfate reacts with chlorine to form sodium bisulfate and hydrochloric acid. This reaction removes chlorine from aqueous solutions:Na2S2O3 + 4Cl2 + 5H2O → 2NaHSO4 + 8HCl
Sodium thiosulfate reacts with hydrochloric acid, decomposing to sulfur and sulfur dioxide: Na2S2O3 + 2HCl → 2NaCl + S + SO2 + H2O.
Definition
ChEBI: An inorganic sodium salt composed of sodium and thiosulfate ions in a 2:1 ratio.
General Description
Sodium thiosulfate (Na2S2O3) can be obtained from Na2S2O3.10H2O by heating above 100 °C. It can be synthesized from sodium sulfate.
Hazard
Use in foods restricted to 0.1%.
Safety Profile
Moderately toxic by subcutaneous route. Incompatible with metal nitrates, sodium nitrite. When heated to decomposition it emits very toxic fumes of Na2O and SOx. See also SODIUM THIOSULFATE and SODIUM THIOSULFATE, PENTAHYDRATE.
Purification Methods
Crystallise it from EtOH/H2O solutions or from water (0.3mL/g) below 60o by cooling to 0o, and dry it at 35o over P2O5 under vacuum. [Foerster & Mommsen Chem Ber 57 258 1924.] This salt is used as a secondary standard in volumetric analysis [Kilpatrick J Am Chem Soc 45 2132 1923], and is used as “Hypo” in photography [Hargreaves & Dunningham J Soc Chem Ind 42 147T 1923.]
Sodium thiosulfate Preparation Products And Raw materials
Raw materials
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|---|---|---|---|---|---|
| ANJI BIOSCIENCES | +91-9000100077 +91-9000100077 | Hyderabad, India | 430 | 58 | Inquiry |
| sheetalchemicals | +91-9820130159 +91-9820130159 | Maharashtra, India | 77 | 58 | Inquiry |
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| Kronox Lab Sciences Pvt Ltd | +91-9313231074 +91-9313231074 | Gujarat, India | 240 | 58 | Inquiry |
| Ghanshyam Chemicals | +91-7210130135 +91-9824087558 | Gujarat, India | 20 | 58 | Inquiry |
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| Vishal Chemical Industries | +91-9820175806 +91-9820175827 | Maharashtra, India | 11 | 58 | Inquiry |
| Supplier | Advantage |
|---|---|
| ANJI BIOSCIENCES | 58 |
| sheetalchemicals | 58 |
| JSK Chemicals | 58 |
| Kronox Lab Sciences Pvt Ltd | 58 |
| Ghanshyam Chemicals | 58 |
| Snow White Products | 58 |
| Bini Chemicals | 58 |
| Karn Chem Corporation | 58 |
| Cosmic Chemicals | 58 |
| Vishal Chemical Industries | 58 |
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