Description

n-(3,5-Di-tert-Butylphenyl)-n-(Phenylsulfonyl)Aminyl Radical is a stable nitroxide radical compound, valued for its role as a highly effective polymerization inhibitor and radical scavenger in industrial processes. Its primary commercial value lies in its ability to control radical reactions, prevent premature polymerization during storage and transport, and act as a mediator in controlled radical polymerization techniques. This product is essential for manufacturers in the polymer, petrochemical, and specialty chemical industries who require reliable stabilization of monomers and intermediates.

Application

• Polymerization Inhibitor: Prevents unwanted thermal polymerization of styrene, acrylics, and other vinyl monomers during distillation, purification, and storage.
• Radical Scavenger / Antioxidant: Protects sensitive chemicals, fuels, and lubricants from degradation by quenching free radicals.
• Mediator for Nitroxide-Mediated Polymerization (NMP): Enables the synthesis of polymers with controlled molecular weight and narrow polydispersity.
• Stabilizer for Petrochemical Streams: Used in the refining and processing of hydrocarbon feedstocks to prevent gum and resin formation.
• Research & Development: Serves as a spin label in electron paramagnetic resonance (EPR) spectroscopy and as a model compound in radical chemistry studies.
• Additive for Adhesives and Coatings: Enhances shelf-life and stability of radical-cure formulations.

Basic Information

Product Name	n-(3,5-Di-tert-Butylphenyl)-n-(Phenylsulfonyl)Aminyl Radical
CAS No.	66651-39-6
Molecular Formula	C20H26NO2S
Molecular Weight	344.49 g/mol
Synonyms	N-(3,5-Di-tert-butylphenyl)-N-(phenylsulfonyl)aminoxyl; 2,2,6,6-Tetramethyl-1-(phenylsulfonyloxy)-4-piperidinyloxy; SG1 Nitroxide; N-(Phenylsulfonyl)-N-(3,5-di-tert-butylphenyl)nitroxide; Noxyl SG1; SG1 Alkoxyamine Precursor; DEPN (Derivative); Stable Free Radical
EINECS	Contact for details

Quality Control

Our production of n-(3,5-Di-tert-Butylphenyl)-n-(Phenylsulfonyl)Aminyl Radical adheres to stringent quality management protocols. Every batch is analyzed to ensure high purity and consistent performance as a radical control agent. Certificates of Analysis (COA) documenting identity, purity, and related substances are provided to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C) under an inert atmosphere (e.g., nitrogen or argon) to minimize oxidation. Keep away from heat, sparks, and open flame. Isolate from strong reducing agents.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.