Polycondensation inhibitor 702 / 4-Oxo-TEMPO CAS 2896-70-0

English name:4-Oxo-2,2,6,6-tetramethylpiperidinooxy

CAS No.:2896-70-0

Synonyms: (2,2,6,6-Tetramethyl-4-Oxopiperidin-1-Yl)Oxidanyl; 1-Hydroxy-2,2,6,6-Tetramethylpiperidin-4-One; 1-Oxyl-2,2,6,6-tetramethyl-4-oxopiperidine; 1-Oxyl-2,2,6,6-tetramethyl-4-piperidone; 1-Oxyl-2,2,6,6-tetramethylpiperidin-4-one; 1-Piperidinyloxy, 2,2,6,6-tetramethyl-4-oxo-; 2,2′,6,6′-Tetramethyl-4-oxopiperidine-1-oxyl; 2,2,6,6-Tetramethyl-4-oxo-1-piperidinooxy;

Chemical structure:

Molecular formula:C9H16NO2

Molecular weight:170.23


4-Oxo-TEMPO CAS 2896-70-0

Appearance Light orange crystals
Content ≥98%
Melting point 36-40°C
Ash ≤0.1%
Volatility ≤0.5%

4-Oxo-TEMPO Usage

1. Polycondensation inhibitor 702 is a new type of high efficient free radical type inhibitor with wide application and high efficiency in inhibiting polycondensation, with good inhibiting effect in both aerobic and anaerobic environment and low melting point.

2. It is used to prevent self-polymerization of polyolefin monomers during production, separation, refining, storage or transportation, and to control and regulate the degree of polymerization of olefins and their derivatives in organic synthesis reactions. The product has good polymerization blocking effect on acrylates, methacrylates, acrylic acid, acrylonitrile, styrene and butadiene. Its polymerization inhibition performance is better than phenols, aromatic amines, ethers, quinones and nitro compounds and other inhibitors.


4-Oxo-TEMPO Precautions

Avoid sunlight, humidity, high temperature, avoid storage with other acidic chemicals.


4-Oxo-TEMPO Packaging

180kg drum, or according to customer’s specified requirements.

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