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Impurities and reference standards

Phenidone

Also known as 1-Phenyl-3-pyrazolidinone, 1-Phenyl-3-pyrazolidone, 3-Pyrazolidinone, 1-phenyl-

CAS 92-43-3Formula C9H10N2OMolar mass 162.19 g/molEC 202-155-1
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 23 suppliers listed
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Phenidone chemical structure, C9H10N2O, CAS 92-43-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
92-43-3
Formula
C9H10N2O
Molar mass
162.19 g/mol
EC number
202-155-1
HS code
293319
Category
Impurities and reference standards

What is Phenidone?

Plain description, key identifiers and synonyms

Phenidone is a chemical substance with the molecular formula C9H10N2O and a molar mass of 162.19 g/mol. Its CAS registry number is 92-43-3. The IUPAC name is 1-phenylpyrazolidin-3-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-phenylpyrazolidin-3-one
CAS number
92-43-3 CAS number cross-checkedOther or deprecated CAS: 14776-33-1
EC number
202-155-1
Molecular formula
C9H10N2O
UNII
H0U5612P6K
MDL number
MFCD00003094
InChIKey
CMCWWLVWPDLCRM-UHFFFAOYSA-N
InChI
InChI=1S/C9H10N2O/c12-9-6-7-11(10-9)8-4-2-1-3-5-8/h1-5H,6-7H2,(H,10,12)
SMILES (canonical and isomeric)
C1CN(NC1=O)C2=CC=CC=C2

Synonyms

  • 1-Phenyl-3-pyrazolidinone
  • 1-Phenyl-3-pyrazolidone
  • 3-Pyrazolidinone, 1-phenyl-
  • 1-phenylpyrazolidin-3-one
  • Fenidon
  • Pyrazolidinone, 1-phenyl-
  • 1-Phenyl-3-oxopyrazolidine
  • 2-Pyrazolin-3-ol, 1-phenyl-
  • 1-Phenyl-pyrazolidin-3-one
  • 1-Phenylpyrazolid-3-one
  • 1-phenyl-4,5-dihydro-1H-pyrazol-3-ol
  • Phenidone A
  • Edaravone Impurity 25
  • N-phenylpyrazolidin-3-one
  • 2-Pyrazolin-3-one, 1-phenyl-
  • 1-Phenyl-3-pyrazolidinone, 97%
  • pyrazole, tetrahydro-3-oxo-1-phenyl-
  • (phenidone)1-Phenyl-pyrazolidin-3-one
  • 1-Phenyl-pyrazolidin-3-one(Phenidone)
  • Sdccgmls-0064787.p001
  • 1-Phenyl-pyrazolidin-3-one (Phenidone)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
162.19 g/molcalc.
Exact mass
162.0793 Dacalc.
LogP (octanol/water)
0.93calc.
Topological polar surface area
32.34 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
12calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.22calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=C1CCN(c2ccccc2)N1

O=C1CCN(c2ccccc2)N1

2 rings, 12 atoms. This chemical is the scaffold itself.

67 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Phenidone suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 23 suppliers
23 of 23 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

23 suppliers in 8 countries

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Phenidone price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Pharmacological actions

  • Antioxidants
  • Cyclooxygenase Inhibitors
  • Lipoxygenase Inhibitors

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 606-022-00-2

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Phenidone is traded under.

HS 2933.19Indicative HS code

Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the…

World exports in 2024
$3.44B
−22.6% vs 2023, imports $6.66B
2019 to 2024
Top exporters
  1. China21.6%
  2. Switzerland * partner reported20.5%
  3. Germany19.0%
Top importers
  1. Slovenia38.4%
  2. Portugal14.1%
  3. Brazil13.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Phenidone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Phenidone, based on the data on this page

What is Phenidone?

Phenidone is a chemical substance with the molecular formula C9H10N2O and a molar mass of 162.19 g/mol. Its CAS registry number is 92-43-3. The IUPAC name is 1-phenylpyrazolidin-3-one.

What is the CAS number of Phenidone?

The CAS registry number of Phenidone is 92-43-3. Other or deprecated CAS numbers: 14776-33-1.

What is the molecular formula and weight of Phenidone?

The molecular formula of Phenidone is C9H10N2O and its molar mass is 162.19 g/mol.

What is Phenidone used for?

Known uses and roles of Phenidone include antioxidants, cyclooxygenase inhibitors and lipoxygenase inhibitors.

Is Phenidone hazardous?

Phenidone carries the GHS signal word "Warning". Main hazards: harmful if swallowed, toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phenidone?

Phenidone is usually classified under HS code 293319 (Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phenidone?

CompoundList lists 23 suppliers of Phenidone in United States, India, China, Hong Kong and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Phenidone in India?

5 suppliers in India list Phenidone on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Phenidone?

Suppliers quote Phenidone on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Phenidone

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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