Hafnium(IV) trifluoromethanesulfonate hydrate
Hafnium(IV) trifluoromethanesulfonate hydrate, CAS: 161337-67-3, with a molecular weight of 774.77 (anhydrous basis), is a key hafnium-based Lewis acid. This compound serves as a highly effective and recyclable catalyst, notably for the mononitration of o-nitrotoluene. Its robust nature and catalytic activity make it a valuable reagent in organic synthesis and inorganic chemistry research.
- IUPAC
- Hafnium(IV) triflate,Hf(OTf)4
- Synonyms
- Hafnium(IV) triflate

Catalyst for Mononitration
Hafnium(IV) trifluoromethanesulfonate hydrate is an excellent and recyclable catalyst for the mononitration of o-nitrotoluene. Its application in this specific transformation highlights its utility in selective organic synthesis.
Lewis Acid Catalysis
As a strong Lewis acid, this hafnium triflate can catalyse a variety of organic reactions. Its Lewis acidity is exploited in reactions requiring activation of substrates or stabilisation of transition states.
Inorganic Synthesis
The compound finds application within inorganic chemistry, potentially serving as a precursor or reagent in the synthesis of other hafnium-containing materials or coordination complexes.
| Molecular weight | 774.77 (anhydrous basis) |
|---|---|
| Linear formula | (CF3SO3)4Hf |
| Application | Excellent and recyclable catalyst for the mononitration of o-nitrotoluene.8 |
| Melting point | >350 °C(lit.) |

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 |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 Hafnium(IV) trifluoromethanesulfonate hydrate used for?
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Hafnium(IV) trifluoromethanesulfonate hydrate is primarily used as an excellent and recyclable catalyst for the mononitration of o-nitrotoluene. It also functions as a Lewis acid in various organic and inorganic synthesis applications.
What is the CAS number and formula for Hafnium(IV) trifluoromethanesulfonate hydrate?
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The CAS number is 161337-67-3 and the linear formula is (CF3SO3)4Hf. The molecular weight is 774.77 on an anhydrous basis.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Hafnium(IV) trifluoromethanesulfonate hydrate. The specific grade and purity are detailed on the product specification sheet; TSS does not represent this product as USP, BP, or EP grade.
How should Hafnium(IV) trifluoromethanesulfonate hydrate be handled?
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Handle Hafnium(IV) trifluoromethanesulfonate hydrate with appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, and gloves. Avoid breathing dust and ensure adequate ventilation to prevent respiratory irritation. It is classified as a Warning with hazards H315, H319, and H335.
Is Hafnium(IV) trifluoromethanesulfonate hydrate suitable for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Hafnium(IV) trifluoromethanesulfonate hydrate, adhering to all relevant shipping regulations.
How can I request a quote or sample?
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To request a quote or sample of Hafnium(IV) trifluoromethanesulfonate hydrate, please contact our sales team through the website or by direct enquiry, providing your contact details and the required quantity.
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