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TEMPO

TEMPO Structure
TEMPO structure
CAS No.
2564-83-2
Chemical Name:
TEMPO
Synonyms
TEMPO;TEPO;2,2,6,6-TETRAMETHYL-1-PIPERIDINYLOXY;2,2,6,6-TETRAMETHYLPIPERIDINE 1-OXYL;2,2,6,6-Tetramethylpiperidin-1-oxyl;(2,2,6,6-Tetramethylpiperidin-1-yl)oxyl;2,2,6,6-TETRAMETHYLPIPERIDINE-N-OXYL;Tanane;Tanan;TEMPO,98%
CBNumber:
CB6309451
Molecular Formula:
C9H18NO*
Molecular Weight:
156.25
MDL Number:
MFCD00009599
MOL File:
2564-83-2.mol
MSDS File:
SDS
Last updated:2026-01-05 11:31:08
Product description Number Pack Size Price
TEMPO 98% 214000 1g $29.1
TEMPO 98% 214000 5g $66.1
2,2,6,6-Tetramethylpiperidine-1-oxyl (free radical) for synthesis 8.14681 5G $108
2,2,6,6-Tetramethylpiperidine-1-oxyl (free radical) for synthesis 8.14681 25g $201
2,2,6,6-Tetramethylpiperidine 1-Oxyl Free Radical >98.0%(GC)(T) T1560 5g $45
More product size
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TEMPO 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)
Flash point 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)
EWG's Food Scores 1
FDA UNII VQN7359ICQ
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)
UNSPSC Code 12352119
NACRES NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS05
Signal word  Danger
Hazard statements  H314-H412
Precautionary statements  P260-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
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  TSCA listed
HazardClass  8
PackingGroup  III
HS Code  29333999
Limited Quantities 1.0 L (0.3 gallons) (liquid) or 1 Kg (2.2 lbs) (solid)
Excepted Quantities Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)
NFPA 704
1
3 0

TEMPO price More Price(50)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 214000 TEMPO 98% 2564-83-2 1g $29.1 2025-07-31 Buy
Sigma-Aldrich 214000 TEMPO 98% 2564-83-2 5g $66.1 2025-07-31 Buy
Sigma-Aldrich 8.14681 2,2,6,6-Tetramethylpiperidine-1-oxyl (free radical) for synthesis 2564-83-2 5G $108 2022-05-15 Buy
Sigma-Aldrich 8.14681 2,2,6,6-Tetramethylpiperidine-1-oxyl (free radical) for synthesis 2564-83-2 25g $201 2022-05-15 Buy
TCI Chemical T1560 2,2,6,6-Tetramethylpiperidine 1-Oxyl Free Radical >98.0%(GC)(T) 2564-83-2 5g $45 2025-07-31 Buy
Product number Packaging Price Buy
214000 1g $29.1 Buy
214000 5g $66.1 Buy
8.14681 5G $108 Buy
8.14681 25g $201 Buy
T1560 5g $45 Buy

TEMPO Chemical Properties,Uses,Production

Description

2,2,6,6-Tetramethylpiperidine is a product that is used for the most diverse purposes because of its strong basicity, for example, as a light stabilizer for polyolefins, as a cocatalyst in olefin polymerizations (Ziegler catalysts), as a building block for the synthesis of pharmaceuticals and crop protection products, as a cocatalyst in the synthesis of dichloroacetyl chloride. The 4-unsubstituted 2.2.6,6-tetramethylpiperidine is generally prepared from the corresponding 4-oxo compound. It is known that triacetonamine can be converted by hydrazine to the hydrazone, which is then cleaved in the presence of alkali into 2,26,6-tetramethylpiperidine and nitrogen.

Chemical Properties

orange crystals or powder

Characteristics

2,2,6,6-Tetramethylpiperidinooxy(TEMPO) has the characteristics of high yield, good selectivity, good stability, and recyclable use.

Uses

TEMPO(2,2,6,6-Tetramethylpiperidinooxy) is a stable radical prepared through the oxidation of 2,2,6,6-tetramethylpiperidine. TEMPO has a wide range of applications including use as a free radical scavenger, a reagent in organic synthe sis and as a structural probe in electron spin resonance spectroscopy. TEMPO can also be used as a mediator in free radical polymerization.

Uses

In organic chemistry as a radical trap, 2,2,6,6-Tetramethylpiperidinooxy can be used as a catalyst and in polymerization mediation.

Uses

TEMPO can be used:

  • As a catalytic oxidant for copper-catalyzed, greener oxidation of alcohols under aerobic conditions.
  • As a catalytic oxidant in the iodobenzene diacetae oxidation of nerol to neral.
  • For trapping the styrenyl radical generated from benzoyl peroxide during nitroxide-mediated radical polymerization of styrene.
  • In the carboxylation of water-resistant nanofibrillated cellulose (NFC) films.

Copper(I)/TEMPO-catalyzed aerobic oxidation of primary alcohols to aldehydes with ambient air

General Description

For a synthetic protocol using NMP initiators, contributed by Prof. Karen Wooley, please visit our technology spotlight.

reaction suitability

reagent type: oxidant

Purification Methods

Purify TEMPO by sublimation (33o, water aspirator) [Hay & Fincke J Am Chem Soc 109 8012 1987, Keana Chem Rev 78 37 1978].

TEMPO synthesis

768-66-1
2564-83-2
Synthesis of TEMPO from 2,2,6,6-Tetramethylpiperidine

TEMPO Preparation Products And Raw materials

Raw materials

2,2,6,6-Tetramethylpiperidine Hydrogen peroxide Phosphotungstic acid hydrate Diethyl ether CALCIUM SULFATE
Sulfuric acid

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Preparation Products

MORPHOLINE-3,4-DICARBOXYLIC ACID 4-TERT-BUTYL ESTER Cyclopropanecarboxaldehyde 4-tert-Butylcyclohexanone (S)-4-BOC-MORPHOLINE-3-CARBOXYLIC ACID 6-Hydroxy-2-naphthaldehyde

TEMPO Suppliers

Global( 670)Suppliers
Supplier Tel Email Country ProdList Advantage
Jinan Dexinjia Bio&Tech Co., Ltd
+86-0531-82375818 +86-15064153060 sales@jndxj.com China 1371 58
Changyi Longchang Bio-Chemical Co., LTD
+86-13256193735; +8613256193735 info@longchangchemical.com China 1044 58
Shaanxi Didu New Materials Co. Ltd 		+86-89586680 +86-13289823923 1026@dideu.com China 9080 58
Hebei Zhuanglai Chemical Trading Co.,Ltd 		+8613343047651 admin@zlchemi.com China 3692 58
Capot Chemical Co.,Ltd. 		+86-（0）57185586718; +8613336195806 sales@capot.com China 29735 60
Shanghai Daken Advanced Materials Co.,Ltd 		+86-2158073036 info@dakenam.com China 13588 58
Henan Tianfu Chemical Co.,Ltd. 		+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21604 55
Shanghai Time Chemicals CO., Ltd. 		+86-021-57951555 +8617317452075 jack.li@time-chemicals.com China 1803 55
Hefei TNJ Chemical Industry Co.,Ltd. 		+86-0551-65418679 +8618949832763 info@tnjchem.com China 2988 55
career henan chemical co 		+86-0371-86658258 +8613203830695 sales@coreychem.com China 29840 58
Supplier Advantage
Jinan Dexinjia Bio&Tech Co., Ltd
58
Changyi Longchang Bio-Chemical Co., LTD
58
Shaanxi Didu New Materials Co. Ltd 		58
Hebei Zhuanglai Chemical Trading Co.,Ltd 		58
Capot Chemical Co.,Ltd. 		60
Shanghai Daken Advanced Materials Co.,Ltd 		58
Henan Tianfu Chemical Co.,Ltd. 		55
Shanghai Time Chemicals CO., Ltd. 		55
Hefei TNJ Chemical Industry Co.,Ltd. 		55
career henan chemical co 		58

Related articles

View Lastest Price from TEMPO manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,2,6,6-Tetramethylpiperidinooxy pictures 2026-01-06 2,2,6,6-Tetramethylpiperidinooxy
2564-83-2
 0.99 RongNa Biotechnology Co.,Ltd
2,2,6,6-Tetramethylpiperidinooxy pictures 2026-01-06 2,2,6,6-Tetramethylpiperidinooxy
2564-83-2
 US $12.00 / KG 1KG 99% 200mt/year Jinan Finer Chemical Co., Ltd
2,2,6,6-Tetramethylpiperidinooxy pictures 2026-01-05 2,2,6,6-Tetramethylpiperidinooxy
2564-83-2
 US $0.00-0.00 / KG 1g 99% 2000tons Shaanxi Dideu Medichem Co. Ltd

TEMPO Spectrum

2,2,6,6-Tetramethylpiperidinooxy(2564-83-2)MS2,2,6,6-Tetramethylpiperidinooxy(2564-83-2)1HNMR2,2,6,6-Tetramethylpiperidinooxy(2564-83-2)IR12,2,6,6-Tetramethylpiperidinooxy(2564-83-2)IR22,2,6,6-Tetramethylpiperidinooxy(2564-83-2)Raman2,2,6,6-Tetramethylpiperidinooxy(2564-83-2)ESR

2564-83-2(TEMPO)Related Search:

Haloperidol Benzoyl peroxide Triacetonediamine 2,2,6,6-Tetramethyl-4-piperidinol 1,2,2,6,6-Pentamethyl-4-piperidinol
2,2,6,6-Tetramethylpiperidine Triacetonamine 4-Hydroxy-2,2,6,6-tetramethylpiperidinooxy radical,4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxy Diphenoxylate 3,5-Dibromo-4-oxo-2,2,6,6-tetramethylpiperidin-1-yl
4-Acetylamino-2,2,6,6-tetramethylpiperidin-N-oxyl,4-Acetamido-2,2,6,6-tetramethylpiperidinooxy,4-ACETYLAMINO-2,2,6,6-TETRAMETHYLPIPERIDIN-1-OXYL 4-OXO-2,2,6,6-TETRAMETHYLPIPERIDINOOXY, FREE RADICAL,4-OXO-2,2,6,6-TETRAMETHYLPIPERIDINOOXY,4-Oxo-2,2,6,6-tetramethylpiperidinooxy, 95%, free radical 4-Amino-TEMPO, free radical 4-BENZOYLOXY-TEMPO [4-Methoxy-2,2,6,6-tetramethylpiperidinooxy]radical
Tetrabutylammonium hydroxide 4-CYANO-TEMPO 4-(2-CHLOROACETAMIDO)-2,2,6,6-TETRAMETHYLPIPERIDINE 1-OXYL

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TEMPO, FREE RADICAL 2,2,6,6-Tetramethyl-1-piperidyloxy 2,2,6,6-Tetramethylpiperidin-1-oxy 2,2',6,6'-Tetramethylpiperidin-1-oxyl 2,2,6,6-TETRAMETHYLPIPERIDINOOXY 2,2,6,6-TETRAMETHYLPIPERIDINOOXY, FREE RADICAL 2,2,6,6-TETRAMETHYL PIPERIDINOXY 2,2,6,6-TETRAMETHYLPIPERIDINOXY FREE RADICAL 2,2,6,6-TETRAMETHYL-4-PIPERIDINYLOXY 2,2,6,6-TETRAMETHYLPIPERIDIN-1-OXYL FREE RADICAL 2,2,6,6-TETRAMETHYL-1-PIPERIDINOOXY 2,2,6,6-TETRAMETHYL-1-PIPERIDINYLOXY,FREE RADICAL 2,2,6,6-TETRAMETHYL-1-PIPERIDINYLOXY, RADICAL TETRABUTYLAMMONIUM HYDROXIDE 1.0M SOLN& 2,2,6,6-Tetramethyl-1-Piperidinyloxy(Tempo) 2,2,6,6-Tetramethyl-1-piperidinyloxiTEMPO 2,2,6,6-Tetramethylpiperidine-1-oxyl(TEMPO,freeradical) 1-Piperidinyloxy, 2,2,6,6-tetramethyl- 2,2,6,6-TETRAMETHYLPIPERIDINOOXY (TEMPO) 2,2,6,6-TETRAMETHYLPIPERIDINYLOXY / TEMPO, FREE RADICAL 2,2,6,6-Tetramethylpiperidine-1-oxyl, free radical TEMPO FREE RADICAL (2,2,6,6-TETRAMETHYLPIPERIDINOOXY) 2,2,6,6-tetramethylpiperidinyloxy,free radical 1-Oxy-2,2,6,6-tetramethylpiperidine, free radical TEMPO, free radical, 98+% TEMPO/2,2,6,6-TETRAMETHYLPIPERIDINOOXY free radical, 2,2,6,6-Tetramethylpiperidine 1-oxyl 2,2,6,6-Tetramethylpiperidine-1-oxyl (free radical) for synthesis 1,1,5,5-Tetramethylpentamethylene nitroxide 1-Oxyl-2,2,6,6-tetramethylpiperidine 1-Piperidinyloxy radical, 2,2,6,6-tetramethyl- 2,2,6,6-Tetramethyl-1-oxylpiperidine 2,2,6,6-Tetramethyl-1-piperadoxyl 2,2,6,6-tetramethyl-1-piperidinylox TEMPO, free radica TEMPO,2,2,6,6-Tetramethyl-1-piperidinyloxy, free radical, 2,2,6,6-Tetramethylpiperidine 1-oxyl, TEMPO 2,2,6,6-Tetramethylpiperidine 1-oxyl, free radical - solid melt TEMPO Oxidation Agent 2,2,6,6-Tetramethylpiperidine 1-oxyl, free radical - free flowing milled solid 2,2,6,6-TetraMethylpiperidinooxy, 98% 5GR 2,2,6,6-Tetramethylpiperidine N-oxide 2,2,6,6-Tetramethylpiperidinooxy ,98% (2,2,6,6-Tetramethylpiperidin-1-yloxy)radical 2,2,6,6-Tetramethyl-4-piperidone,free radical 2,2,6,6-tetramethylperidinooxy Piperidinooxy, 2,2,6,6-tetramethyl- tetramethylpiperidinenitroxide 2,2,6,6-TETRAMETHYLPIPERIDINE-1-N-OXYL 2,2,6,6-TETRAMETHYLPIPERIDINE 1-OXYL, RADICAL 2,2,6,6-TETRAMETHYLPIPERIDINEOXIDE 2,2,6,6-tetramethyl-4-piperidine 1-oxy, radical 2,2,6,6-Tetramethyl-1-piperidinyloxy, free radical, 2,2,6,6-Tetramethylpiperidine 1-oxyl, TEMPO 2,2,6,6-Tetramethyl-1-piperidinyloxy, free radical, TEMPO 2,2,6,6-Tetramethylpiperidine nitroxide 2,2,6,6-Tetramethylpiperidine nitroxide radical 2,2,6,6-Tetramethylpiperidine N-oxide radical 2,2,6,6-Tetramethylpiperidine N-oxyl radical 2,2,6,6-tetramethyl-piperidinoox