4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acid
Tech Serve Solutions (TSS) supplies 4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acid (CAS: 34598-33-9), a perfluorinated carboxylic acid with the molecular formula CF3(CF2)7CH2CH2COOH and a molecular weight of 492.13 g/mol. This compound is primarily utilised in chemical synthesis, particularly within the specialised fields of fluorous synthesis and as an Rf-tagged building block. Its unique fluorinated structure makes it valuable for specific organic chemistry applications.
- IUPAC
- 2H,2H,3H,3H-Perfluoroundecanoic acid
- Synonyms
- 5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acidCF3(CF2)7CH2CH2COOH2H,2H,3H,3H-Perfluoroundecanoic acid

Fluorous Synthesis
This compound serves as a crucial building block in fluorous synthesis, a technique that leverages the unique solubility properties of perfluorinated compounds to facilitate separation and purification of reaction products.
Rf-Tagged Precursor
As an Rf-tagged building block, it is employed in the synthesis of more complex molecules where the perfluoroalkyl chain can be used for specialised separation or analytical purposes.
Specialty Chemical Synthesis
It finds application in various specialty synthesis pathways where the incorporation of a long, highly fluorinated alkyl chain is required for modifying material properties or creating novel chemical structures.
| Molecular weight | 492.13 |
|---|---|
| Linear formula | CF3(CF2)7CH2CH2COOH |
| Assay | ≥95.0% (NT) |
| Melting point | 93-97 °C |

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 |
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 4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acid used for?
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This compound is used in chemical synthesis, particularly in fluorous synthesis and as an Rf-tagged building block or precursor in specialty synthesis.
What are the CAS number and formula for 4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acid?
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The CAS number is 34598-33-9, and its linear formula is CF3(CF2)7CH2CH2COOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of ≥95.0% (NT). TSS does not represent this product as USP, BP, EP, or other pharmacopoeia grades.
How should 4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acid be handled?
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This compound is a warning irritant (H315-H319-H335). When handling, wear a dust mask type N95 (US), eyeshields, and gloves. Avoid breathing dust. Ensure adequate ventilation.
Is this chemical suitable for international export?
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Yes, Tech Serve Solutions specialises in the global supply and export of fine chemicals, pharmaceutical intermediates, and laboratory reagents.
How can I request a sample or quote?
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Please contact our sales team to request a sample or a quote for 4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Heptadecafluoroundecanoic acid.
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