4-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy

2,2,5,5-四甲基-4-苯基-3-咪唑啉-1-氧自由基

Also known as: PTMIO, free radical, 2,2,5,5-Tetramethyl-4-phenyl-3-imidazoline-1-oxyl, 4-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy free radical, 1-λ1-oxidanyl-2,2,5,5-tetramethyl-4-phenylimidazole

4-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy (CAS 39753-69-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C13H17N2O and a molecular weight of 217.28700 g/mol. It is also known as PTMIO, free radical, 2,2,5,5-Tetramethyl-4-phenyl-3-imidazoline-1-oxyl and 4-Phenyl-2,2,5,5-tetramethyl-3-imidazolin-1-yloxy free radical. Key properties include a melting point of 81-82ºC(lit.), a boiling point of 312.6ºC at 760mmHg, a density of 1.06g/cm3 and a flash point of 142.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

39753-69-0

Jingsj CID

J-27802-9

Molecular Formula

C₁₃H₁₇N₂O

Chinese Name

2,2,5,5-四甲基-4-苯基-3-咪唑啉-1-氧自由基

Molecular Weight

217.28700 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026