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ChemicalBook >> CAS DataBase List >> 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid

2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid

2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid price.
  • $135 - $739
  • Product name: 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid
  • CAS: 2154-67-8
  • MF: C9H14NO3*
  • MW: 184.21
  • EINECS:218-447-7
  • MDL Number:MFCD00041847
  • Synonyms:2,2,5,5-tetramethyl-1-oxy-3-pyrroline-3-carboxylic acid;2,2,5,5-TETRAMETHYL-3-PYRROLIN-1-OXYL- 3-CARBOXYLIC ACID 99%;(3-Carboxy-2,2,5,5-tetramethyl-3-pyrroline-1-yloxy)radical;(3-Carboxy-2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol-1-yloxy)radical;[[(2,5-Dihydro-2,2,5,5-tetramethyl-3-carboxy-1H-pyrrole)-1-yl]oxy]radical;[[3-Carboxy-(2,5-dihydro-2,2,5,5-tetramethyl-1H-pyrrol)-1-yl]oxy]radical;CTPC;PCAOL
Price11 Properties Safety Information Description
11 prices
Selected condition：
Brand
  • aablocks
  • Apolloscientific
  • Sigma-Aldrich
  • SynQuest Laboratories
  • Thermo Scientific Chemicals
  • TRC
  • Usbiological
Package
  • 5mg
  • 100mg
  • 250mg
  • 1g
  • 1 g
  • 5 g
  • Manufactureraablocks
  • Product numberAA00BCG4
  • Product descriptionPQQH ≥95%
  • Packaging250mg
  • Price$286
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA00BCG4
  • Product descriptionPQQH ≥95%
  • Packaging1g
  • Price$739
  • Updated2026-05-28
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR24671
  • Product description2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical ≥95%
  • Packaging1g
  • Price$524
  • Updated2026-06-04
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR24671
  • Product description2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical ≥95%
  • Packaging250mg
  • Price$184
  • Updated2026-06-04
  • Buy
  • ManufacturerSigma-Aldrich
  • Product numberT141062
  • Product description1-Hydroxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid, free radical Aldrich
  • Packaging5mg
  • Price$139
  • Updated2024-03-01
  • Buy
  • ManufacturerSynQuest Laboratories
  • Product number4H45-1-24
  • Product description2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical
  • Packaging1g
  • Price$576
  • Updated2021-12-16
  • Buy
  • ManufacturerSynQuest Laboratories
  • Product number4H45-1-24
  • Product description2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical
  • Packaging250mg
  • Price$192
  • Updated2021-12-16
  • Buy
  • ManufacturerThermo Scientific Chemicals
  • Product number42064
  • Product description2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid, 99% 99%
  • Packaging5 g
  • Price$594.65
  • Updated2026-04-24
  • Buy
  • ManufacturerThermo Scientific Chemicals
  • Product number42064
  • Product description2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid, 99% 99%
  • Packaging1 g
  • Price$190
  • Updated2026-04-24
  • Buy
  • ManufacturerTRC
  • Product numberC179075
  • Product description3-Carboxy-2,2,5,5-tetramethyl-3-pyrrolin-1-yloxy,FreeRadical
  • Packaging100mg
  • Price$135
  • Updated2021-12-16
  • Buy
  • ManufacturerUsbiological
  • Product numberC1215-10
  • Product description3-Carboxy-2,2,5,5-tetramethyl-3-pyrrolin-1-yloxy, Free Radical
  • Packaging100mg
  • Price$531
  • Updated2026-06-03
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA00BCG4 PQQH ≥95% 250mg $286 2026-05-28 Buy
aablocks AA00BCG4 PQQH ≥95% 1g $739 2026-05-28 Buy
Apolloscientific OR24671 2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical ≥95% 1g $524 2026-06-04 Buy
Apolloscientific OR24671 2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical ≥95% 250mg $184 2026-06-04 Buy
Sigma-Aldrich T141062 1-Hydroxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole-3-carboxylic acid, free radical Aldrich 5mg $139 2024-03-01 Buy
SynQuest Laboratories 4H45-1-24 2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical 1g $576 2021-12-16 Buy
SynQuest Laboratories 4H45-1-24 2,5-Dihydro-1-oxy-2,2,5,5-tetramethylpyrrole-3-carboxylic acid, free radical 250mg $192 2021-12-16 Buy
Thermo Scientific Chemicals 42064 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid, 99% 99% 5 g $594.65 2026-04-24 Buy
Thermo Scientific Chemicals 42064 2,2,5,5-Tetramethyl-3-pyrrolin-1-oxyl-3-carboxylic acid, 99% 99% 1 g $190 2026-04-24 Buy
TRC C179075 3-Carboxy-2,2,5,5-tetramethyl-3-pyrrolin-1-yloxy,FreeRadical 100mg $135 2021-12-16 Buy
Usbiological C1215-10 3-Carboxy-2,2,5,5-tetramethyl-3-pyrrolin-1-yloxy, Free Radical 100mg $531 2026-06-03 Buy

Properties

Melting point :202 °C
Boiling point :318.16°C (rough estimate)
Density :1.1776 (rough estimate)
refractive index :1.4760 (estimate)
storage temp. :-20°C Freezer
solubility :soluble in Chloroform, Methanol
form :Crystalline Powder
color :Yellow
EPA Substance Registry System :1H-Pyrrol-1-yloxy, 3-carboxy-2,5-dihydro-2,2,5,5-tetramethyl- (2154-67-8)

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Description

A highly reactive spin-label.

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Suppliers and manufacturers

J & K SCIENTIFIC LTD. Meryer (Shanghai) Chemical Technology Co., Ltd. 3B Pharmachem (Wuhan) International Co.,Ltd. Chemsky（shanghai）International Co.,Ltd. Shanghai Ennopharm Co., Ltd. RYSS TECH LTD Thermo Fisher Scientific Finetech Industry Limited Shanghai Qiao Chemical Science Co., Ltd Zhengzhou Acme Chemical Co., Ltd.