Description

4-Hydroxy-2,2,6,6-Tetramethyl-Piperidinooxy is a stable nitroxyl radical compound, widely recognized as a key intermediate and a versatile spin trap in chemical synthesis and research. Its primary value lies in its role as a precursor for hindered amine light stabilizers (HALS), which are critical for protecting polymers from UV-induced degradation. This compound is essential for manufacturers and R&D facilities in the polymer, specialty chemical, and material science industries seeking to enhance product durability and performance.

Application

• Polymer Additives: Primary use as a key intermediate in the synthesis of high-performance Hindered Amine Light Stabilizers (HALS) for plastics, coatings, and fibers.
• Spin Trapping Agent: Utilized in electron paramagnetic resonance (EPR) spectroscopy to detect and identify short-lived free radicals in chemical and biological systems.
• Organic Synthesis: Serves as a stable radical catalyst or mediator in controlled oxidation reactions and polymerization processes.
• Antioxidant Research: Acts as a model compound for studying radical scavenging mechanisms and developing new antioxidant formulations.
• Material Science: Incorporated into advanced materials to study radical processes or to impart specific stability properties.
• Pharmaceutical Intermediates: Potential use in the synthesis of complex molecules where nitroxyl radicals are required.

Basic Information

Product Name	4-Hydroxy-2,2,6,6-Tetramethyl-Piperidinooxy
CAS No.	2226-96-2
Molecular Formula	C9H18NO2
Molecular Weight	172.25 g/mol
Synonyms	4-Hydroxy-TEMPO; 4-Hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl; 4-Hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl; 4-Hydroxy-2,2,6,6-tetramethylpiperidinyloxy; 4-Hydroxy-TEMPO radical; 4-Hydroxy-2,2,6,6-tetramethylpiperidine N-oxyl; 4-Hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxy; 4-Hydroxy-2,2,6,6-tetramethylpiperidin-1-oxy
EINECS	218-760-4

Quality Control

Our production of 4-Hydroxy-2,2,6,6-Tetramethyl-Piperidinooxy adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including HPLC, NMR, and EPR to confirm identity, assay, and radical content. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong reducing agents. For long-term storage, consider an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	69 - 73 °C
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.