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Description

Pentachloropyridine · CAS 2176-62-7 · C5Cl5N. UNII 6MM852KA6T. Boiling Point: 280 °C; Melting Point: 125.5 °C; LogP: log Kow= 3.53.

Identification

CAS Registry Number	2176-62-7
PubChem CID	16584
Molecular formula	C5Cl5N
IUPAC name	2,3,4,5,6-pentachloropyridine
UNII (FDA)	6MM852KA6T

Computed Descriptors

Molecular Weight	251.3
XLogP3	4.7
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	250.844387
Monoisotopic Mass	248.847337
Topological Polar Surface Area	12.9
Heavy Atom Count	11
Formal Charge	0

Physical & Chemical Properties

Boiling Point	280 °C
Melting Point	125.5 °C
LogP	log Kow= 3.53
LogP	3.53
Dissociation Constants	pKa= -1.00

Physical description & handling notes

• Other Solid
• White chips; [MSDSonline]
• Very soluble in benzene, ethanol, ligroin
• When heated to decomposition it emits very toxic fumes of /hydrogen chloride/ and /nitrogen oxides/.

Regulatory Status

Regulatory & Food Contact	FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS

GHS Hazard Classification

Reported hazard statements	H302 (100%), H315 (44%), H317 (93%), H319 (44%), H334 (38%), H335 (43%), H400 (98%), H410 (60%)

Documented Uses

• 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.
• 2023: 1,000,000 - <5,000,000 lb
• 2022: 5,000,000 - <10,000,000 lb
• 2021: 10,000,000 - <50,000,000 lb
• 2020: 10,000,000 - <50,000,000 lb
• Pyridine, 2,3,4,5,6-pentachloro-: ACTIVE

Synonyms

PENTACHLOROPYRIDINE; Perchloropyridine; 2176-62-7; Pyridine, pentachloro-; 2,3,4,5,6-Pentachloropyridine; Pyridine, 2,3,4,5,6-pentachloro-; DTXSID2022179; MFCD00006230; 6MM852KA6T; NSC-26286; DTXCID102179; CAS-2176-62-7; C5Cl5N; HSDB 5867; EINECS 218-535-5; NSC 26286

Frequently Asked Questions

What are the CAS number and molecular formula of Pentachloropyridine?

CAS 2176-62-7; molecular formula C5Cl5N; molecular weight — g/mol.

What other names is Pentachloropyridine known by?

PENTACHLOROPYRIDINE, Perchloropyridine, 2176-62-7, Pyridine, pentachloro-, 2,3,4,5,6-Pentachloropyridine, Pyridine, 2,3,4,5,6-pentachloro-.

What is the regulatory status of Pentachloropyridine?

Documented regulatory listings: FDA Inventory of Food Contact Substances Listed in 21 CFR: FCS.

Is Pentachloropyridine classified as hazardous?

Hazard statements reported: H302, H315, H317, H319, H334.

What are the key physical properties of Pentachloropyridine?

Boiling Point: 280 °C; Melting Point: 125.5 °C; LogP: log Kow= 3.53; LogP: 3.53.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.