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2,2,6,6-Tetramethylpiperidinooxy CAS#2564-83-2

2,2,6,6-Tetramethylpiperidinooxy CAS#2564-83-2 Promotion Season Now in Store and Free Sample for Testing with Factory Price

Chemical Name：2,2,6,6-Tetramethylpiperidinooxy

CAS No.:2564-83-2

Molecular Formula:C9H18NO*

Molecular weight:156.25

Sample: Available

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Product Details

Products Description of 2,2,6,6-Tetramethylpiperidinooxy CAS#2564-83-2

2,2,6,6-Tetramethylpiperidinyl oxide, abbreviated as TEMPO, is a piperidine-type nitrogen oxide free radical. TEMPO is an orange-red, easily sublimable crystal or liquid, and is easily soluble in solvents such as water, ethanol, and benzene. It has the function of capturing free radicals and quenching singlet oxygen, and is a very effective oxidation catalyst that can oxidize primary alcohols to aldehydes and secondary alcohols to ketones.

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2,2,6,6-Tetramethylpiperidinooxy Chemical Properties

Melting point	36-38 °C(lit.)
Boiling point	193°C
density	1 g/cm3
vapor pressure	0.4 hPa (20 °C)
refractive index	1.4350 (estimate)
Fp	154 °F
storage temp.	Store below +30°C.
solubility	9.7g/l
form	Powder
color	Yellow to green
PH	8.3 (9g/l, H2O, 20℃)
Water Solubility	Soluble in all organic solvents. Insoluble in water.
Merck	14,9140
BRN	1422418
Stability:	Stable. Incompatible with strong acids, strong oxidizing agents. Refrigerate.
InChIKey	RVWUHFFPEOKYLB-UHFFFAOYSA-N
CAS DataBase Reference	2564-83-2(CAS DataBase Reference)
NIST Chemistry Reference	1-Piperidinyloxy, 2,2,6,6-tetramethyl-(2564-83-2)
EPA Substance Registry System	1-Piperidinyloxy, 2,2,6,6-tetramethyl- (2564-83-2)

Safety Information

Hazard Codes	C,Xi
Risk Statements	34-36/37/38
Safety Statements	26-36/37/39-45-24/25
RIDADR	UN 3263 8/PG 2
WGK Germany	3
RTECS	TN8991900
Autoignition Temperature	275 °C
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29333999

Product Application of 2,2,6,6-Tetramethylpiperidinooxy CAS#2564-83-2

TEMPO is widely used in chemistry, biology, food industry, agriculture and other fields. It has the functions of capturing free radicals, quenching singlet oxygen and selective oxidation.

In polymer chemistry, it is used as a free radical scavenger, inhibitor, anti-aging agent, thermal degradation inhibitor and light and heat stabilizer. It can also combine with active chain free radicals to form covalent dormant species. Covalent dormant species can be split into chain free radicals and then grow.

In organic synthesis, it is used as a catalyst for the oxidation reaction of various alcohols and polyols. It is used to oxidize primary alcohols to aldehydes with high selectivity and no longer oxidize to carboxylic acids; it oxidizes secondary alcohols to ketones. TEMPO/NaClO/NaBr is a recyclable oxidation system, in which the real oxidant is the intermediate N-oxoammonium ion generated by the oxidation of TEMPO by NaClO. The primary hydroxyl group attacks the ion with nucleophilicity, and the hydroxyl group is oxidized to carboxyl. The ion is converted into hydroxylamine, which is then oxidized to N-oxoammonium ion by a co-oxidant, and the cycle continues. There are many other oxidation systems containing TEMPO.

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