3,6-二氯吡啶-2-甲酸

Description

3,6-dichloropyridine-2-carboxylic acid · CAS 1702-17-6 · C6H3Cl2NO2. UNII 10G14M0WDH. Melting Point: 151-152 °C; Vapor Pressure: 0.000012 [mmHg]; Vapor Pressure: 9.98X10-6 mm Hg at 25 °C.

Identification

CAS Registry Number	1702-17-6
PubChem CID	15553
Molecular formula	C6H3Cl2NO2
IUPAC name	3,6-dichloropyridine-2-carboxylic acid
UNII (FDA)	10G14M0WDH

Computed Descriptors

Molecular Weight	192.00
XLogP3	2.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	1
Exact Mass	190.9540837
Monoisotopic Mass	190.9540837
Topological Polar Surface Area	50.2
Heavy Atom Count	11
Formal Charge	0

Physical & Chemical Properties

Melting Point	151-152 °C
Vapor Pressure	0.000012 [mmHg]
Vapor Pressure	9.98X10-6 mm Hg at 25 °C
LogP	log Kow = 1.06
LogP	1.06
Dissociation Constants	2.32
Dissociation Constants	pKa = 2.32

Physical description & handling notes

• White odorless solid; [Merck Index] Colorless or white odorless solid; [ICSC] White powder; [MSDSonline]
• ODOURLESS WHITE OR COLOURLESS CRYSTALS.
• White crystalline solid
• Colorless crystals
• Odorless
• In water, 7.85X10+3 mg/L (distilled water); 188 g/L at pH 5, 143 g/L ay pH 7; 157 g/L at pH 9, all at 20 °C

GHS Hazard Classification

Reported hazard statements	H318, H410 (15.8%), H411 (33.8%)

Documented Uses

• Used as post-emergence herbicide for control of annual and perennial broad-leaved weeds in beets, maize, onions, strawberries, flax, and grassland; [HSDB] Used as a herbicide and food additive; [Hawley]
• Post-emergence control of many annual and perennial broad-leaved weeds of the families Polygonaceae, Compositae, Leguminosae, and Umbelliferae ... Provides particularly good control of creeping thistle (Cirsium arvense), perennial sow-thistle, coltsfoot, mayweeds, and Polygonum species.
• Clopyralid is produced by photochlorination of picoline, followed by further photochlorination and oxidation.
• 2-Pyridinecarboxylic acid, 3,6-dichloro- is listed as a High Production Volume (HPV) chemical (65FR81686). Chemicals listed as HPV were produced in or imported into the U.S. in >1 million pounds in 1990 and/or 1994. The HPV list is based on the 1990 Inventory Update Rule. (IUR) (40 CFR part 710 subpart B; 51FR21438).
• Production volumes for non-confidential chemicals reported under the Inventory Update Rule.[Table#6086]
• 2-Pyridinecarboxylic acid, 3,6-dichloro-: ACTIVE

Synonyms

CLOPYRALID; 1702-17-6; 3,6-Dichloropyridine-2-carboxylic acid; 3,6-Dichloropicolinic acid; 3,6-Dichloro-2-pyridinecarboxylic acid; Cirtoxin; Matrigon; Versatill; Lontrel 3; 2-Pyridinecarboxylic acid, 3,6-dichloro-; Lontrel L; Clopyralide; Benzalox; Cyronal; Lontrel 100; Dowco 290

Frequently Asked Questions

What are the CAS number and molecular formula of 3,6-dichloropyridine-2-carboxylic acid?

CAS 1702-17-6; molecular formula C6H3Cl2NO2; molecular weight — g/mol.

What other names is 3,6-dichloropyridine-2-carboxylic acid known by?

CLOPYRALID, 1702-17-6, 3,6-Dichloropyridine-2-carboxylic acid, 3,6-Dichloropicolinic acid, 3,6-Dichloro-2-pyridinecarboxylic acid, Cirtoxin.

Is 3,6-dichloropyridine-2-carboxylic acid classified as hazardous?

Hazard statements reported: H318, H410, H411.

What are the key physical properties of 3,6-dichloropyridine-2-carboxylic acid?

Melting Point: 151-152 °C; Vapor Pressure: 0.000012 [mmHg]; Vapor Pressure: 9.98X10-6 mm Hg at 25 °C; LogP: log Kow = 1.06.

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.