CAS No. 2226-96-2
EC No. 218-760-9
Synonyms 1-λ1-Oxidanyl-2,2,6,6-tetramethylpiperidin-4-ol


4-hydroxy-2,2,6,6-tetramethylpiperidinoxyl is used as a catalyst for the oxidation of alcohols to the corresponding aldehydes and chemical oxidant and as a polymerisation inhibitor, particularly during the purification of styrene. 4-hydroxy-2,2,6,6-tetramethylpiperidinoxyl appears as an orange-red flake and is soluble in water, ethanol, benzene and other organic solvents.


  • Coatings, adhesives & sealants
  • Washing & cleaning products
  • Metal, mining, oil & gas
  • Plastics, pulp, paper & packaging


Shelf Life

Under proper storage conditions, the shelf life is 12 months.

Health & Safety

Detailed information on the product described can be found in our relevant Health and Safety Information (Material Safety Data Sheet).