4-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy, free radical
4-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy, free radical (CAS 39753-69-0) is a stable nitroxide radical with the molecular formula C13H17N2O and a molecular weight of 217.29 g/mol. It is recognised for its paramagnetic properties and is utilised in chemical synthesis, particularly within radical chemistry. Its stable radical nature makes it a valuable reagent for specific synthetic transformations.
- Synonyms
- 5-tetramethyl-3-imidazolin-1-yloxy, free radical39753-69-0C13H17N2O

Chemical Synthesis Reagent
This compound serves as a specialised reagent in organic synthesis. Its stable radical character allows it to participate in unique reaction mechanisms, facilitating transformations that are difficult to achieve with conventional reagents.
Radical Chemistry Studies
As a stable free radical, it is employed in the study of radical reaction kinetics and mechanisms. Researchers utilise it to probe reaction pathways and understand the behaviour of radical intermediates in various chemical processes.
Spin Labelling
The paramagnetic nature of the nitroxide group makes this compound potentially useful as a spin label. In certain contexts, it can be attached to molecules to study their structure and dynamics using Electron Paramagnetic Resonance (EPR) spectroscopy.
| Molecular weight | 217.29 |
|---|---|
| Empirical formula | C13H17N2O |
| Assay | 98% |
| Melting point | 81-82 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy, free radical used for?
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This compound is primarily used as a reagent in chemical synthesis, particularly within the field of radical chemistry, and for studies involving stable free radicals.
What are the CAS number and formula for this compound?
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The CAS number is 39753-69-0, and its empirical formula is C13H17N2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound at a purity of 98%. We do not represent this product as meeting USP, BP, EP, or other pharmacopoeia standards.
What safety precautions should be taken when handling this chemical?
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Handle with care, using appropriate personal protective equipment including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used if inhalation is a risk. This compound is classified with WGK Germany 3.
How is this product packed, shipped, and exported?
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Tech Serve Solutions adheres to all relevant regulations for the safe packing, shipping, and international export of fine chemicals, ensuring products reach customers securely and compliantly.
How can I request a sample or obtain a quote for this chemical?
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To request a sample or obtain a quote, please contact our sales department through the website or by phone, providing the product name and CAS number (39753-69-0).
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