TAA Triacetonamine

Triacetonamine (TAA, 2,2,6,6-tetramethyl-4-piperidone) is the most fundamental starting intermediate for hindered amine light stabilizers (HALS), produced by the condensation of acetone with ammonia. Through reduction, amination and N-substitution it yields a family of hindered amine intermediates (tetramethylpiperidinol, pentamethylpiperidinol, tetramethylpiperidylamine, etc.), which are further converted into mainstream HALS such as 770, 944 and 292.

Chemical Name2,2,6,6-Tetramethyl-4-piperidone (Triacetonamine)
CAS No.826-36-8
Molecular FormulaC₉H₁₇NO
Molecular Weight155.24
AppearanceWhite to pale yellow crystals
Melting / Boiling Point34–43 °C / 205 °C

Applications: HALS intermediate; precursor to TEMPO nitroxyl radicals; intermediate for pharmaceuticals, agrochemicals and organic synthesis.