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Heterocyclic building blocks

Phenopyrazone

Also known as 1,4-Diphenylpyrazolidine-3,5-dione, 1,4-Diphenyl-3,5-pyrazolidinedione, Diphenox

CAS 3426-01-5Formula C15H12N2O2Molar mass 252.27 g/molEC 222-324-3
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Phenopyrazone chemical structure, C15H12N2O2, CAS 3426-01-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
3426-01-5
Formula
C15H12N2O2
Molar mass
252.27 g/mol
EC number
222-324-3
HS code
293319
Category
Heterocyclic building blocks

What is Phenopyrazone?

Plain description, key identifiers and synonyms

Phenopyrazone is a chemical substance with the molecular formula C15H12N2O2 and a molar mass of 252.27 g/mol. Its CAS registry number is 3426-01-5. The IUPAC name is 1,4-diphenylpyrazolidine-3,5-dione.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,4-diphenylpyrazolidine-3,5-dione
CAS number
3426-01-5 CAS number cross-checked
EC number
222-324-3
Molecular formula
C15H12N2O2
UNII
19OVL5JYLL
InChIKey
ZZMSHBOVYPIYOB-UHFFFAOYSA-N
InChI
InChI=1S/C15H12N2O2/c18-14-13(11-7-3-1-4-8-11)15(19)17(16-14)12-9-5-2-6-10-12/h1-10,13H,(H,16,18)
SMILES (canonical and isomeric)
C1=CC=C(C=C1)C2C(=O)NN(C2=O)C3=CC=CC=C3

Synonyms

  • 1,4-Diphenylpyrazolidine-3,5-dione
  • 1,4-Diphenyl-3,5-pyrazolidinedione
  • Diphenox
  • Phenopyrazon
  • Kr 122
  • 3,5-Pyrazolidinedione, 1,4-diphenyl-
  • 1,4-Diphenyl-3,5-dioxo-pyrazolidin

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
252.27 g/molcalc.
Exact mass
252.0899 Dacalc.
LogP (octanol/water)
1.85calc.
Topological polar surface area
49.41 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
19calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.07calc.
Formal charge
0calc.
Stereocentres
1calc.
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=C1NN(c2ccccc2)C(=O)C1c1ccccc1

O=C1NN(c2ccccc2)C(=O)C1c1ccccc1

3 rings, 19 atoms. This chemical is the scaffold itself.

2 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Phenopyrazone suppliers

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

No supplier listings yet

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Phenopyrazone 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

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Phenopyrazone 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 Phenopyrazone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Phenopyrazone?

Phenopyrazone is a chemical substance with the molecular formula C15H12N2O2 and a molar mass of 252.27 g/mol. Its CAS registry number is 3426-01-5. The IUPAC name is 1,4-diphenylpyrazolidine-3,5-dione.

What is the CAS number of Phenopyrazone?

The CAS registry number of Phenopyrazone is 3426-01-5.

What is the molecular formula and weight of Phenopyrazone?

The molecular formula of Phenopyrazone is C15H12N2O2 and its molar mass is 252.27 g/mol.

What is Phenopyrazone used for?

Known uses and roles of Phenopyrazone include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Phenopyrazone hazardous?

No GHS hazard classification for Phenopyrazone is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Phenopyrazone?

Phenopyrazone 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 Phenopyrazone?

Post a free request on CompoundList and suppliers of Phenopyrazone will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Phenopyrazone?

Suppliers quote Phenopyrazone 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 Phenopyrazone

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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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