3-carboxy-proxyl

Modify Date: 2025-08-21 18:40:01

3-carboxy-proxyl Structure
3-carboxy-proxyl structure
Common Name 3-carboxy-proxyl
CAS Number 2154-68-9 Molecular Weight 187.236
Density 1.1±0.1 g/cm3 Boiling Point 307.2±31.0 °C at 760 mmHg
Molecular Formula C9H17NO3 Melting Point 200ºC (dec.)
MSDS Chinese USA Flash Point 139.6±24.8 °C

 Names

Name 2,2,5,5-Tetramethyl-3-carboxypyrrolidine-N-oxyl
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.1±0.1 g/cm3
Boiling Point 307.2±31.0 °C at 760 mmHg
Melting Point 200ºC (dec.)
Molecular Formula C9H17NO3
Molecular Weight 187.236
Flash Point 139.6±24.8 °C
Exact Mass 187.120850
PSA 60.77000
LogP 0.30
Vapour Pressure 0.0±1.4 mmHg at 25°C
Index of Refraction 1.495
Storage condition 0-6°C

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
UY6705500
CHEMICAL NAME :
1-Pyrrolidinyloxy, 3-carboxy-2,2,5,5-tetramethyl-
CAS REGISTRY NUMBER :
2154-68-9
LAST UPDATED :
199706
DATA ITEMS CITED :
2
MOLECULAR FORMULA :
C9-H16-N-O3

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
2812 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
INVRAV Investigative Radiology. (Lippincott/Harper, Journal Fulfillment Dept., 2350 Virginia Ave., Hagerstown, MD 21740) V.1- 1966- Volume(issue)/page/year: 19,549,1984

 Safety Information

Hazard Codes Xi
Risk Phrases 36/37/38
Safety Phrases S24/25
RIDADR NONH for all modes of transport
RTECS UY6705500

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 Synonyms

pca(radical)
4-carboxy-PROXYL
1-oxyl-2,2,5,5-tetramethylpyrroline-3-carboxylic acid
3-CARBOXY-PROXYL,FREE RADICAL
1-oxyl-2,2,5,5-tetramethylpyrrolidine-3-carboxylic acid radical
RARECHEM AL BO 1259
3-Carboxy-2,2,5,5-tetraMethylpyrrolidine 1-Oxyl Free Radical
3-carboxy-2,2,5,5-tetramethylpyrrolidine-N-oxyl radical
t517
Carboxyproxyl
3-Pyrrolidinecarboxylic acid, 1-hydroxy-2,2,5,5-tetramethyl-
4-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxyl radical
EINECS 218-448-2
3-Carboxy-PROXYL
1-Hydroxy-2,2,5,5-tetramethyl-3-pyrrolidinecarboxylic acid
MFCD00003167
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