Ammonium tetrathiotungstate
Ammonium tetrathiotungstate (CAS: 13862-78-7), with the molecular formula (NH₄)₂WS₄ and a molecular weight of 348.18 g/mol, is a crystalline solid. This compound serves as a key building block in the synthesis of transition metal sulfide cluster compounds. It is primarily utilized in materials science and research for creating novel sulfide-based materials and complexes.

Synthesis of Metal Sulfide Clusters
Ammonium tetrathiotungstate is a fundamental precursor for generating diverse transition metal sulfide clusters. It has been employed in the low-temperature synthesis of heterometallic sulfide clusters, often stabilized by phosphine ligands like dppm.
Materials Science Research
This compound is valuable in materials science for the development of new sulfide-based materials. Its unique structure allows for the exploration of novel compounds with potential applications in catalysis or advanced materials.
Inorganic Chemistry Synthesis
It acts as a versatile reagent in inorganic synthesis, enabling the formation of complex sulfur-containing tungsten compounds. This is crucial for advancing the understanding and application of coordination chemistry.
| Molecular weight | 348.18 |
|---|---|
| Linear formula | (NH4)2WS4 |
| Assay | ≥99.9% trace metals basis |
| Form | crystalline |
| Density | 2.71 g/mL at 25 °C(lit.) |
| Application | This classic building block for transition metal sulfide cluster compounds was recently used in a low-temperature, solid state synthesis of a new series of heterometallic sulfide clusters stabilized with dppm [bis(diphenylphosphino)methane] ligands.1 |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3335 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Ammonium tetrathiotungstate used for?
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Ammonium tetrathiotungstate is primarily used as a building block for synthesizing transition metal sulfide cluster compounds and in materials science research for developing novel sulfide-based materials.
What is the CAS number and formula for Ammonium tetrathiotungstate?
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The CAS number is 13862-78-7 and the linear formula is (NH₄)₂WS₄.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Ammonium tetrathiotungstate with an assay of ≥99.9% trace metals basis. This product is not represented as USP, BP, EP, or other pharmacopoeial grades.
How should Ammonium tetrathiotungstate be handled safely?
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Ammonium tetrathiotungstate is classified as a Warning hazard (GHS07), with specific hazards including skin irritation (H315), eye irritation (H319), and respiratory irritation (H335). Appropriate personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Handle in a well-ventilated area and avoid dust formation.
Is Ammonium tetrathiotungstate packed, shipped, or exported by TSS?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Ammonium tetrathiotungstate, and provides appropriate packaging and shipping solutions.
How can I request a quote or sample for Ammonium tetrathiotungstate?
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To request a quote or sample for Ammonium tetrathiotungstate, please contact the Tech Serve Solutions sales team via our website or direct inquiry channels.
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