Cyclopentadienyltungsten(II) tricarbonyl chloride
Cyclopentadienyltungsten(II) tricarbonyl chloride (CAS: 12128-24-4; Formula: C8H5ClO3W) is an organometallic compound with a molecular weight of 368.42 g/mol. This tungsten complex is primarily utilised in chemical synthesis and catalysis, owing to the reactivity of the tungsten centre and the cyclopentadienyl ligand. It serves as a precursor or reagent in various organometallic chemistry research and development activities. Tech Serve Solutions supplies this compound with a 97% assay.

Organometallic Synthesis
Serves as a valuable building block in the synthesis of more complex organometallic structures and coordination compounds. Its defined structure allows for predictable reactivity in substitution and addition reactions.
Catalysis Research
Investigated for its potential catalytic properties in various organic transformations. The tungsten centre, activated by the cyclopentadienyl and carbonyl ligands, can participate in catalytic cycles.
Precursor for Materials Science
Can be used as a precursor for the deposition of tungsten-containing thin films or nanoparticles through techniques like chemical vapour deposition (CVD).
| Molecular weight | 368.42 |
|---|---|
| Empirical formula | C8H5ClO3W |
| Assay | 97% |

Hazard statements
- H261In contact with water releases flammable gas
Precautionary statements
- P231Handle under inert gas
- P422
| Protective equipment | Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3395 4.3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Risk statements (R) | 14 |
| Safety statements (S) | 43 |
| Supplemental hazards | Reacts violently with water. |
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 Cyclopentadienyltungsten(II) tricarbonyl chloride used for?
+
Cyclopentadienyltungsten(II) tricarbonyl chloride is used in organometallic synthesis, catalysis research, and as a precursor in materials science.
What is the CAS number and formula for Cyclopentadienyltungsten(II) tricarbonyl chloride?
+
The CAS number is 12128-24-4, and the empirical formula is C8H5ClO3W.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Cyclopentadienyltungsten(II) tricarbonyl chloride at a minimum assay of 97%. This product is not analysed to pharmacopoeia standards and should not be considered USP, BP, or EP grade.
How should Cyclopentadienyltungsten(II) tricarbonyl chloride be handled safely?
+
This compound reacts violently with water and is classified under GHS02 with a Danger signal word (H261). Handle with appropriate personal protective equipment including eyeshields and gloves, in a dry environment, and avoid contact with water. Refer to the Safety Data Sheet for detailed handling instructions.
Is this chemical suitable for use in food or pharmaceuticals?
+
No, this chemical is supplied for research and industrial use only and has not been tested or certified for food, pharmaceutical, or medical applications.
How is Cyclopentadienyltungsten(II) tricarbonyl chloride packed and shipped?
+
This compound is shipped under UN 3395 (Class 4.3, Packing Group II) due to its reactivity with water. Packaging adheres to strict international regulations for hazardous materials transport, ensuring safe export.
How can I request a sample or quote for Cyclopentadienyltungsten(II) tricarbonyl chloride?
+
Please contact our sales team via the website or email to request a quotation or a sample. Provide your details and the quantity required.
▶ Related products

Benzeneruthenium(II) chloride dimer
Ru2(C6H6)2Cl4
Catalysis & Inorganic
Benzoylferrocene
C17H14FeO
Catalysis & Inorganic
Benzyldiphenylphosphine
C6H5CH2P(C6H5)2
Catalysis & Inorganic
Beryllium
Be
Catalysis & Inorganic
Beryllium oxide
BeO
Catalysis & Inorganic![Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer — chemical structure, CAS 12257-42-0; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F12257-42-0.png&w=3840&q=75)
Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer
Catalysis & Inorganic
![Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo — chemical structure, CAS 1228149-03-8; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1228149-03-8.png&w=3840&q=75)
Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo
1-d:1′
Catalysis & Inorganic![Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride (C16H20ClN3Ni) — chemical structure, CAS 1033772-47-2; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1033772-47-2.png&w=3840&q=75)
Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride
C16H20ClN3Ni
Catalysis & Inorganic▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis