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Dyes and pigments

Pyrazolone

Also known as Pyrazol-3-one, 3H-Pyrazol-3-one, oxodiazole

CAS 39455-90-8Formula C3H2N2OMolar mass 82.06 g/mol
7 suppliers listed
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Pyrazolone chemical structure, C3H2N2O, CAS 39455-90-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
39455-90-8
Formula
C3H2N2O
Molar mass
82.06 g/mol
HS code
293319
Category
Dyes and pigments

What is Pyrazolone?

Plain description, key identifiers and synonyms

Pyrazolone is a chemical substance with the molecular formula C3H2N2O and a molar mass of 82.06 g/mol. Its CAS registry number is 39455-90-8. The IUPAC name is pyrazol-3-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
pyrazol-3-one
CAS number
39455-90-8 CAS number cross-checkedOther or deprecated CAS: 56240-95-0
Molecular formula
C3H2N2O
InChIKey
JEXVQSWXXUJEMA-UHFFFAOYSA-N
InChI
InChI=1S/C3H2N2O/c6-3-1-2-4-5-3/h1-2H
SMILES (canonical and isomeric)
C1=CN=NC1=O

Synonyms

  • Pyrazol-3-one
  • 3H-Pyrazol-3-one
  • oxodiazole
  • oxo-pyrazole

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
82.06 g/molcalc.
Exact mass
82.0167 Dacalc.
LogP (octanol/water)
0.49calc.
Topological polar surface area
41.79 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
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=C1C=CN=N1

O=C1C=CN=N1

1 ring, 6 atoms. This chemical is the scaffold itself.

6 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.

Pyrazolone suppliers

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

All 7 suppliers
7 of 7 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

7 suppliers in 5 countries

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Pyrazolone 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

  • Anti-Inflammatory Agents, Non-Steroidal
  • Coloring Agents

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 Pyrazolone 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 Pyrazolone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Pyrazolone?

Pyrazolone is a chemical substance with the molecular formula C3H2N2O and a molar mass of 82.06 g/mol. Its CAS registry number is 39455-90-8. The IUPAC name is pyrazol-3-one.

What is the CAS number of Pyrazolone?

The CAS registry number of Pyrazolone is 39455-90-8. Other or deprecated CAS numbers: 56240-95-0.

What is the molecular formula and weight of Pyrazolone?

The molecular formula of Pyrazolone is C3H2N2O and its molar mass is 82.06 g/mol.

What is Pyrazolone used for?

Known uses and roles of Pyrazolone include anti-inflammatory agents, non-steroidal and coloring agents.

Is Pyrazolone hazardous?

No GHS hazard classification for Pyrazolone 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 Pyrazolone?

Pyrazolone 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 Pyrazolone?

CompoundList lists 7 suppliers of Pyrazolone in India, Canada, France, Japan and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pyrazolone in India?

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

What is the price of Pyrazolone?

Suppliers quote Pyrazolone 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 Pyrazolone

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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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