Ammonium thiosulfate , 96% , 7783-18-8

Synonym(s):
Diammonium thiosulfate

CAS NO.：7783-18-8

Empirical Formula: H8N2O3S2

Molecular Weight: 148.21

MDL number: MFCD00015965

EINECS: 231-982-0

PRODUCT Properties

• Melting point: 150 °C (lit.)
• Density: 1.679 g/mL at 25 °C (lit.)
• solubility: H2O: very soluble(lit.)
• form: Crystalline Powder
• color: White
• Odor: Ammonical odour
• Water Solubility: Soluble in water, slightly soluble in acetone. Insoluble in ethanol and diethyl ether.
• Sensitive: Hygroscopic
• Merck: 14,562
• Stability: Stable. Hygroscopic.
• InChI: InChI=1S/2H3N.H2O3S2/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)
• InChIKey: XYXNTHIYBIDHGM-UHFFFAOYSA-N
• SMILES: S(=S)(=O)(O)O.N.N
• LogP: -0.428 (est)

Description and Uses

Ammonium thiosulfate is a white crystallinesolid with an ammonia odor. Molecular weight= 148.21;Freezing/Melting point= 150 C [decomposes ,50℃(solution); .100℃ (anhydrous crystals)]. HazardIdentification (based on NFPA-704 M Rating System):Health 1, Flammability 0, Reactivity 0. Highly soluble inwater.

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.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H302-H319
• Precautionary statements: P305+P351+P338
• Risk Statements: 33-36/37/38
• Safety Statements: 26-37
• WGK Germany: 1
• RTECS: XN6465000
• TSCA: Yes
• HS Code: 28323000
• Toxicity: LD50 orl-rat: 2890 mg/kg GTPZAB 26(6),54,82