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Heterocyclic building blocks

Pentachloropyridine

Also known as Perchloropyridine, Pyridine, pentachloro-, 2,3,4,5,6-Pentachloropyridine

CAS 2176-62-7Formula C5Cl5NMolar mass 251.33 g/molEC 218-535-5
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 12 suppliers listed
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Pentachloropyridine chemical structure, C5Cl5N, CAS 2176-62-7
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Solid
Melting point
125.5 °C
Boiling point
280 °C
Solubility
Very soluble in benzene, ethanol, ligroin
HS code
293339
Category
Heterocyclic building blocks
Illustrative photo, drums, an IBC tote and sacks in a chemical warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Pentachloropyridine?

Plain description, key identifiers and synonyms

Pentachloropyridine is a chemical substance with the molecular formula C5Cl5N and a molar mass of 251.33 g/mol. Its CAS registry number is 2176-62-7. The IUPAC name is 2,3,4,5,6-pentachloropyridine.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,3,4,5,6-pentachloropyridine
CAS number
2176-62-7 CAS number cross-checked
EC number
218-535-5
Molecular formula
C5Cl5N
UNII
6MM852KA6T
MDL number
MFCD00006230
InChIKey
DNDPLEAVNVOOQZ-UHFFFAOYSA-N
InChI
InChI=1S/C5Cl5N/c6-1-2(7)4(9)11-5(10)3(1)8
SMILES (canonical and isomeric)
C1(=C(C(=NC(=C1Cl)Cl)Cl)Cl)Cl

Synonyms

  • Perchloropyridine
  • Pyridine, pentachloro-
  • 2,3,4,5,6-Pentachloropyridine
  • Pyridine, 2,3,4,5,6-pentachloro-
  • C5Cl5N
  • 2,4,5,6-Pentachloropyridine
  • Pyridine,3,4,5,6-pentachloro-

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

Physical form
Solidexp.
Melting point
125.5 °Cexp.
Boiling point
280 °Cexp.
Solubility
Very soluble in benzene, ethanol, ligroinexp.

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
251.33 g/molcalc.
Exact mass
248.8473 Dacalc.
LogP (octanol/water)
4.35calc.
Topological polar surface area
12.89 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
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, c1ccncc1

c1ccncc1

1 ring, 6 atoms, the Pyridine ring system.

118,162 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
  • H334May cause allergy or asthma symptoms or breathing difficulties if inhaled.
  • H335May cause respiratory irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (28)
  • P233Keep container tightly closed.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P342 + P316If experiencing respiratory symptoms: Get emergency medical help immediately.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P403Store in a well-ventilated place.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • 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

Pentachloropyridine suppliers

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

All 12 suppliers
12 of 12 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

12 suppliers in 3 countries

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Pentachloropyridine 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

Industrial uses: Intermediate.

How it is made

Direct chlorination of pyridine occurs in the vapor phase at over 300 °C in the presence of a diluent. ... Vigorous chlorination of pyridine ... eventually gives pentachloropyridine.

Regulatory status

Inventories, regulations and trade controls that list this substance

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

Frequently asked questions

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

What is Pentachloropyridine?

Pentachloropyridine is a chemical substance with the molecular formula C5Cl5N and a molar mass of 251.33 g/mol. Its CAS registry number is 2176-62-7. The IUPAC name is 2,3,4,5,6-pentachloropyridine.

What is the CAS number of Pentachloropyridine?

The CAS registry number of Pentachloropyridine is 2176-62-7.

What is the molecular formula and weight of Pentachloropyridine?

The molecular formula of Pentachloropyridine is C5Cl5N and its molar mass is 251.33 g/mol.

What is Pentachloropyridine used for?

Industrial uses: Intermediate.

Is Pentachloropyridine hazardous?

Pentachloropyridine carries the GHS signal word "Danger". Main hazards: harmful if swallowed, causes skin irritation, may cause an allergic skin reaction. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Pentachloropyridine?

Pentachloropyridine 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 Pentachloropyridine?

CompoundList lists 12 suppliers of Pentachloropyridine in China, India and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Pentachloropyridine in India?

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

What is the price of Pentachloropyridine?

Suppliers quote Pentachloropyridine 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 Pentachloropyridine

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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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