TMHPO

GENERAL

TMHPO is an orange red crystal. It is an important intermediate for the synthesis of HALS and also can
be used as a pharmaceutical intermediate. It can prevent alkenes from self-polymerisation or control and
adjust the degree of polymerisation.


CHEMICAL NAME :       4-Hydroxy-2,2,6,6-tetramethylpiperidinyloxy
SYNONYMS :       4-Hydroxy-TEMPO or 4-OH-TEMPO
CHEMICAL FORMULA :     C9H18NO2
MOLECULAR WEIGHT :     172.25
CAS NUMBER :           2226-96-2
APPEARANCE :        Orange red crystal

SPECIFICATIONS

PROPERTIES                                         TYPICAL VALUE
Assay, % (Gas Chromatography)             ≥99.0%
Appearance                                   Orange red crystal
Melting Point                                            69-72 C
Weight loss                                                   ≥ 0.5%
Ash                                                               ≤ 0.1%
Appearance, 10% solution                       Clear
in Deionized water   
Tetramethylpiperidinol                             ≤ 1.0%
(TMHPP) content,       
(Gas Chromatography)