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Heterocyclic building blocks

Pyriclor

Also known as 2,3,5-Trichloropyridin-4-ol, 2,3,5-Trichloro-4-pyridinol, Daxtron

CAS 1970-40-7Formula C5H2Cl3NOMolar mass 198.44 g/mol
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Pyriclor chemical structure, C5H2Cl3NO, CAS 1970-40-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1970-40-7
Formula
C5H2Cl3NO
Molar mass
198.44 g/mol
HS code
293339
Category
Heterocyclic building blocks

What is Pyriclor?

Plain description, key identifiers and synonyms

Pyriclor is a chemical substance with the molecular formula C5H2Cl3NO and a molar mass of 198.44 g/mol. Its CAS registry number is 1970-40-7. The IUPAC name is 2,3,5-trichloro-1H-pyridin-4-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,3,5-trichloro-1H-pyridin-4-one
CAS number
1970-40-7 CAS number cross-checked
Molecular formula
C5H2Cl3NO
UNII
68ACR3FCDY
MDL number
MFCD01690819
InChIKey
XTVIFVALDYTCLL-UHFFFAOYSA-N
InChI
InChI=1S/C5H2Cl3NO/c6-2-1-9-5(8)3(7)4(2)10/h1H,(H,9,10)
SMILES (canonical and isomeric)
C1=C(C(=O)C(=C(N1)Cl)Cl)Cl

Synonyms

  • 2,3,5-Trichloropyridin-4-ol
  • 2,3,5-Trichloro-4-pyridinol
  • Daxtron
  • 2,3,5-Trichloro-4-hydroxypyridine
  • 4-Pyridinol, 2,3,5-trichloro-
  • Pyrichlor
  • 4-Hydroxy-2,3,5-trichloropyridine
  • 1-21-00-00203 (Beilstein Handbook Reference)
  • 2,3,5-trichloro-1H-pyridin-4-one
  • 4-Pyridinol,2,3,5-trichloro-
  • Tricoloropyripropanol
  • 2,3,5-trichloro-4-pyridino
  • 2,3,5-trichloro-4-pyridone
  • pyridine, 2,3,5-trichloro-1,4-dihydro-4-oxo-

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
198.44 g/molcalc.
Exact mass
196.9202 Dacalc.
LogP (octanol/water)
2.34calc.
Topological polar surface area
32.86 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
1calc.
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=c1cc[nH]cc1

O=c1cc[nH]cc1

1 ring, 7 atoms, the 4-Hydroxypyridine ring system.

2,433 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.

Pyriclor suppliers

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Pyriclor price

Indicative price range per kg from live supplier offers

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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 Pyriclor is traded under.

HS 2933.39Indicative HS code

Heterocyclic compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure…

World exports in 2024
$9.16B
−17.9% vs 2023, imports $10.6B
2019 to 2024
Top exporters
  1. China21.5%
  2. India * partner reported12.3%
  3. Ireland11.6%
Top importers
  1. Germany14.2%
  2. United States12.8%
  3. Brazil10.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Pyriclor?

Pyriclor is a chemical substance with the molecular formula C5H2Cl3NO and a molar mass of 198.44 g/mol. Its CAS registry number is 1970-40-7. The IUPAC name is 2,3,5-trichloro-1H-pyridin-4-one.

What is the CAS number of Pyriclor?

The CAS registry number of Pyriclor is 1970-40-7.

What is the molecular formula and weight of Pyriclor?

The molecular formula of Pyriclor is C5H2Cl3NO and its molar mass is 198.44 g/mol.

What is Pyriclor used for?

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

Is Pyriclor hazardous?

No GHS hazard classification for Pyriclor 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 Pyriclor?

Pyriclor is usually classified under HS code 293339 (Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pyriclor?

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What is the price of Pyriclor?

Suppliers quote Pyriclor 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 Pyriclor

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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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