Thiosulfuric acid (H2S2O3), monoammonium salt

Base Information

• Chemical Name: Thiosulfuric acid (H2S2O3), monoammonium salt
• CAS No.: 7783-18-8
• Molecular Formula: N2H8S2O3
• Molecular Weight: 148.20
• Hs Code.: 2832.30
• European Community (EC) Number: 233-282-0
• DSSTox Substance ID: DTXSID40905904
• Mol file: 7783-18-8.mol

Synonyms:Thiosulfuric acid (H2S2O3), monoammonium salt;azane;sulfurothioic O-acid;10103-43-2;Ammonium hydrogen thiosulphate;DTXSID40905904;EINECS 233-282-0;Sulfurothioic O,O-acid--ammonia (1/1);Thiosulfuric acid (H2S2O3), ammonium salt (1:1)

Chemical Property of Thiosulfuric acid (H2S2O3), monoammonium salt

Chemical Property:

• Appearance/Colour: white crystalline solid
• Melting Point: 180 °C (dec.)
• PSA: 104.48000
• Density: 1.679g/mLat 25°C(lit.)
• LogP: 1.84280
• Sensitive.: Hygroscopic
• Solubility.: H2O: very soluble(lit.)
• Water Solubility.: Soluble in water, slightly soluble in acetone. Insoluble in ethanol and diethyl ether.
• Hydrogen Bond Donor Count: 3
• Hydrogen Bond Acceptor Count: 5
• Rotatable Bond Count: 0
• Exact Mass: 130.97108537
• Heavy Atom Count: 6
• Complexity: 98.1

Purity/Quality:

98% ^*data from raw suppliers

Ammonium thiosulfate ^*data from reagent suppliers

Safty Information:

• Pictogram(s): R36/37/38:Irritating to eyes, respiratory system and skin.
• Hazard Codes: R36/37/38:Irritating to eyes, respiratory system and skin.
• Statements: 33-36/37/38
• Safety Statements: 26-37

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: N.OS(=O)(=S)O
• Description: Ammonium thiosulfate is an inorganic compound. It is white crystalline solid with ammonia odor, readily soluble in water, slightly soluble in acetone and insoluble in ethanol and diethyl ether. And Ammonium thiosulfate is used in photographic fixer. It is a so-called rapid fixer, acting more quickly than sodium thiosulfate fixers. Fixation involves these chemical reactions (illustrated for silver bromide). Ammonium thiosulfate is also used for leaching of gold and silver. It works with presence of copper as a catalyst here. This process is a nontoxic alternative gold cyanidation. Ammonium thiosulfate can be used as a fertilizer. As suggested by some research studies it can be used as an additive to coal-waste mixtures to reduce formation of very dangerous dioxins and furans. Methods of Manufacturing Direct reaction of ammonium sulfite with sulfur. Besides，the ATS process, sulfur dioxide is absorbed from incinerated Claus tail gas in aqueous ammonia to produce ammonium sulfate and ammonium bisulfite in solution. The solution passes to a converter where it flows countercurrent to hydrogen sulfide. Ammonium thiosulfate forms /in solution and/ is concentrated to 60 wt%.
• Physical properties: Colorless, monoclinic crystal; hygroscopic; decomposes on heating above 100°C; density 1.679 g/cm3; very soluble in water (64 g/100 g at 20°C), insoluble in alcohol, and slightly soluble in acetone.
• Uses: Ammonium thiosulfate finds application for leaching of gold and silver since it forms strong complexes. It is widely utilized as a photographic fixing agent, which acts quicklier than sodium thiosulfate fixers. It serves as a fertilizer. It acts as an additive to coal-waste mixtures to inhibit the formation of dangerous dioxins and furans. It is used as an analytical reagent in laboratories. To clean "white" metal; in photography; in lubricants for metal cold-working.