Galvinoxyl Free Radical
Chemical Name: 2,6-di-tert-butyl-4-((3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl)phenoxy radical
Molecular Formula: C₂₉H₄₁O₂
CAS Number: 2370-18-5
A highly stable phenoxyl radical structurally distinct from TEMPO derivatives. Used as analytical standard for radical scavenging studies and antioxidant research. Deep blue color provides visual indication of radical concentration.

Technical Specifications
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Chemical Identity
| Chemical Name | 2,6-di-tert-butyl-4-((3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl)phenoxy radical |
| Synonyms | 2,6-di-tert-butyl-4-((3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl)phenoxy radical, Galvinoxyl radical |
| CAS Number | 2370-18-5 |
| EC Number | |
| Molecular Formula | C₂₉H₄₁O₂ |
| Molecular Weight | 421.64 g/mol |

VUP Specifications (Standard Grade)
| Property | Specification |
|---|---|
| Appearance | Deep blue to purple crystalline solid |
| Purity | Research grade |
Note: Specifications that are provided above are typical values and should not be considered as guaranteed analysis.
Key Features & Benefits
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Phenoxyl Radical Structure
Structurally distinct from nitroxyl radicals like TEMPO, providing different reactivity patterns and scavenging mechanisms for comparative studies.
Visual Color Indicator
Deep blue color allows visual monitoring of radical concentration and reaction progress. Color intensity correlates with radical concentration.
Exceptional Stability
Highly stable under ambient conditions due to extensive steric hindrance from tert-butyl groups. Maintains radical character for extended periods.
Research Standard
Well-characterized properties make it ideal as analytical reference. Provides reproducible results across different laboratories and applications.
Unique Reactivity Profile
Different reaction kinetics compared to TEMPO radicals enabling study of structure-activity relationships in radical chemistry.
Product Information & Technical Documents
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Product Identification
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Technical Documents
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Technical Data Sheet (TDS)
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Safety Data Sheet (SDS)
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