2,3,5,6-四氯吡啶

Description

2,3,5,6-tetrachloropyridine · CAS 2402-79-1 · C5HCl4N. UNII WJR8HAY65E. Boiling Point: 250.5 °C; Melting Point: 90.5 °C; Vapor Pressure: 0.00606 [mmHg].

Identification

CAS Registry Number	2402-79-1
PubChem CID	16990
Molecular formula	C5HCl4N
IUPAC name	2,3,5,6-tetrachloropyridine
UNII (FDA)	WJR8HAY65E

Computed Descriptors

Molecular Weight	216.9
XLogP3	3.3
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	216.883360
Monoisotopic Mass	214.886310
Topological Polar Surface Area	12.9
Heavy Atom Count	10
Formal Charge	0

Physical & Chemical Properties

Boiling Point	250.5 °C
Melting Point	90.5 °C
Vapor Pressure	0.00606 [mmHg]
LogP	log Kow= 3.32
LogP	3.32
Dissociation Constants	pKa= -0.80

Physical description & handling notes

• Other Solid
• White solid; Darkens upon exposure to light and air; [CHEMINFO] White crystals with a camphor-like odor; [AIHA]
• Very soluble in ether, ethanol, petroleum ether
• When heated to decomposition it emits very toxic fumes of /chlorides/ and /nitrogen oxides/.

GHS Hazard Classification

Reported hazard statements	H301 (37.9%), H302 (62.1%), H317 (56.3%), H411 (61.2%), H336

Documented Uses

• Used as a chemical intermediate in the production of chlorpyrifos and triclopyr; [HSDB]
• 2,3,5,6-Tetrachloropyridine is used as a chemical intermediate in the production of chlorpyrifos and triclopyr.
• Reduction /of pentachloropyridine/ with zinc, or electrochemically, yields 2,3,5,6-tetrachloropyridine.
• 2023: 5,000,000 - <10,000,000 lb
• 2022: 10,000,000 - <50,000,000 lb
• 2021: 10,000,000 - <50,000,000 lb

Synonyms

2,3,5,6-TETRACHLOROPYRIDINE; 2402-79-1; Pyridine, 2,3,5,6-tetrachloro-; DTXSID7027467; Tetrachloropyridine, 2,3,5,6-; NSC-2009; MFCD00092428; WJR8HAY65E; DTXCID107467; SCHEMBL2366051; NSC2009; 5-20-05-00421 (Beilstein Handbook Reference); AKOS005258026; NCGC00257813-01; CAS-2402-79-1; CS-0128415

Frequently Asked Questions

What are the CAS number and molecular formula of 2,3,5,6-tetrachloropyridine?

CAS 2402-79-1; molecular formula C5HCl4N; molecular weight — g/mol.

What other names is 2,3,5,6-tetrachloropyridine known by?

2,3,5,6-TETRACHLOROPYRIDINE, 2402-79-1, Pyridine, 2,3,5,6-tetrachloro-, DTXSID7027467, Tetrachloropyridine, 2,3,5,6-, NSC-2009.

Is 2,3,5,6-tetrachloropyridine classified as hazardous?

Hazard statements reported: H301, H302, H317, H411, H336.

What are the key physical properties of 2,3,5,6-tetrachloropyridine?

Boiling Point: 250.5 °C; Melting Point: 90.5 °C; Vapor Pressure: 0.00606 [mmHg]; LogP: log Kow= 3.32.

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.