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4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl

Also known as: 4-Amino-TEMPO, 4-Amino-TEMPO free radical, 4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl, free radical, 4-Amino-2,2,6,6-tetramethylpiperidinooxy, 4-Amino-2,2,6,6-tetramethylpiperidinyloxy, tempamine, 2,2,6,6-Tetramethyl-4-amino-1-piperidinyloxy, 4-Amino-1-oxy-2,2,6,6-tetramethylpiperidine, 1-Piperidinyloxy, 4-amino-2,2,6,6-tetramethyl-, MFCD00006479

4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl (CAS 14691-88-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H19N2O and a molecular weight of 171.260 g/mol. Key properties include a melting point of 37-39°C, a boiling point of 98 °C / 4mmHg, a density of 0.962g/cm3 and a flash point of 39 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
14691-88-4
Jingsj CID
J-19462-7
Molecular Formula
C9H19N2O
Molecular Weight
171.260 g/mol
Category
Pharma Intermediates
Last updated
11/3/2026
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Physicochemical Properties

Melting Point37-39°C
Boiling Point98 °C / 4mmHg
Density0.962g/cm3
Flash Point39 °C
Exact Mass171.149734
PSA29.26000
LogP1.95040
Vapor Pressure0.00968mmHg at 25°C
Storage Conditions2-8°C

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of 4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl?

The CAS number of 4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl is 14691-88-4.

What are the molecular formula and molecular weight of 4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl?

4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl has molecular formula C9H19N2O and molecular weight 171.260 g/mol.

Is 4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl hazardous?

4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "4-Amino-2,2,6,6-tetramethylpiperidine 1-oxyl (CAS 14691-88-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-19462-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.