Metolachlor

Description

Metolachlor · CAS 63150-68-5 · C15H22ClNO2. UNII X0I01K05X2. Boiling Point: 212 °F at 0.001 mmHg (USCG, 1999); Boiling Point: BP: 100 °C at 0.001 mm Hg; Melting Point: -62.1 °C.

Identification

CAS Registry Number	63150-68-5
PubChem CID	4169
Molecular formula	C15H22ClNO2
IUPAC name	2-chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide
UNII (FDA)	X0I01K05X2

Computed Descriptors

Molecular Weight	283.79
XLogP3	3.1
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	6
Exact Mass	283.1339066
Monoisotopic Mass	283.1339066
Topological Polar Surface Area	29.5
Heavy Atom Count	19
Formal Charge	0

Physical & Chemical Properties

Boiling Point	212 °F at 0.001 mmHg (USCG, 1999)
Boiling Point	BP: 100 °C at 0.001 mm Hg
Melting Point	-62.1 °C
Flash Point	190 °C
Solubility	In water, 530 mg/L at 20 °C
Density	1.12 g/cu cm at 20 °C
Density	1.12 g/cm³
Vapor Pressure	0.0000314 [mmHg]
Vapor Pressure	3.14X10-5 mm Hg at 25 °C
LogP	log Kow = 3.13

Physical description & handling notes

• Metolachlor is a tan to brown oily liquid with a slightly sweet odor. Slightly soluble in water and denser than water. Hence sinks in water. Soluble in most organic solvents. Used as a selective herbicide.
• Colorless liquid; [Merck Index] White to tan liquid; [HSDB]
• ODOURLESS CLEAR LIQUID.
• Colorless liquid
• Colorless to tan liquid
• greater than 230 °F (USCG, 1999)

Regulatory Status

GHS notification summary	4.2% (3 / 71)

GHS Hazard Classification

GHS notification summary	4.2% (3 / 71)
Reported hazard statements	H317 (94.4%), H330 (53.5%), H400 (42.3%), H410 (42.3%), H370, H303

Documented Uses

• Used to control weeds in crops of corn, soybeans, peanuts, sorghum, potatoes, peas, cotton, safflower, stone fruits, nut trees, and ornamentals; also used on roadways; [EXTOXNET] Used in corn, peanuts, and soybeans; [Krieger, p. 1762]
• Preemergence and preplant incorporated weed control
• Control of annual grasses and some broad-leaved weeds ... Often used in combination with broad-leaved herbicides, to extend the spectrum of activity.
• S-metolachlor is a chloroactanilide herbicide, classified as a seedling shoot growth inhibitor. /S-Metolachlor/
• Metolachlor is used for grass and broadleaf weed control in corn, soybean, peanuts, sorghum, and cotton. It is also used in combination with other herbicides. It been detected in ground and surface waters and concentrations ranging from 0.08 to 4.5 parts per billion (ppb) throughout the U.S. Evidence of the bioaccumulation of metolachlor in edible species of fish as well as its adverse effect on the growth and development raise concerns on its effects on human health. (L913).
• Preparation: C. Vogel, R. Aebi, DE 2328340; eidem, US 3937730 (1973, 1976 both to Ciba-Geigy).

Synonyms

metolachlor; 51218-45-2; Pennant; Codal; Dual; Yibingjiacaoan; Dual Magnum; Dual Triple; Metelilachlor; Dual II; Humextra; Ontrack 8E; Dual 720EC; Dual 8E; Dual 960 EC; Metolachlor technical

Frequently Asked Questions

What are the CAS number and molecular formula of Metolachlor?

CAS 63150-68-5; molecular formula C15H22ClNO2; molecular weight — g/mol.

What other names is Metolachlor known by?

metolachlor, 51218-45-2, Pennant, Codal, Dual, Yibingjiacaoan.

Is Metolachlor classified as hazardous?

4.2% of GHS notifications report no hazard classification (3 of 71).

What are the key physical properties of Metolachlor?

Boiling Point: 212 °F at 0.001 mmHg (USCG, 1999); Boiling Point: BP: 100 °C at 0.001 mm Hg; Melting Point: -62.1 °C; Flash Point: 190 °C.

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.