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Metolachlor

Metolachlor structure

CAS No:
51218-45-2
Formula:
C15H22ClNO2
Chemical Name:
Metolachlor
Synonyms:
Acetamide,2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)-;2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide;CGA 24705;Dual;Metetilachlor;Metolachlor;Codal;N-(1-Methyl-2-methoxyethyl)-N-chloroacetyl-2-ethyl-6-methylaniline;Dual Triple;Pennant;Dual 720EC;Yibingjiacaoan;Dual II;Dual Magnum;Dual 960 EC;Jindual;Metoken;2-Chloro-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide;55762-76-0;63150-68-5;94449-58-8
Categories:
Agrochemicals > Herbicides

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Description

Pale Yellow Oil Metolachlor is a colorless or tan to brown, oilyliquid. Slightly sweet odor.

Metolachlor Basic Attributes

Molecular Weight：

283.79

Exact Mass：

283.79

EC Number：

257-060-8

HScode：

2924299017

Characteristics

PSA：

29.5

XLogP3：

2.9

Appearance：

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.

Density：

1.12 g/cm³ @ Temp: 20 °C

Melting Point：

-62.1 °C

Boiling Point：

100 °C @ Press: 1 x 10^-3 Torr

Flash Point：

2 °C

Refractive Index：

1.533

Water Solubility：

Solubility in water, mg/l at 25°C: 488

Storage Conditions：

APPROX 4°C

Vapor Pressure：

Vapour pressure, Pa at 25°C: 0.0042

Toxicity：

Oral-Rat LD50: 2200 mg/kg; Oral-Mouse LD50: 1150 mg/kg

Flammability characteristics：

Combustion produces toxic nitrogen oxides and chloride gases

Safety Information

Transport codes：

UN16483/PG2

wgk germany：

hazard class code：

43-36-20/21/22-11

safety instructions：

36/37-36-26-16

RTECS Number：

AN3430000

Marks：

Xi,Xn,F

Storage features：

The warehouse is ventilated, low temperature and dry; stored and transported separately from food materials

Stability/Shelf Life：

Shelf life of the formulation is estimated to be 5 year minimum based on no significant decomposition at 70 deg C for 3 weeks or at 50 deg C for 20 weeks. There is no crystallization at temperatures below 0 deg C.

Precautionary statement(s)：

P280

Hazard Statements：

H317

Toxicity

Toxicity class：

moderately

Metolachlor Use and Manufacturing

Methods of Manufacturing

The first preparation method uses 2-ethyl-6-methylaniline as the raw material. The two hydrogen atoms on the amino group are first condensed with 2-chloropropanol to lose one molecule of hydrogen chloride, and then condensed with chloroacetyl chloride to lose one molecule of hydrogen chloride. Finally, it reacts with methanol to form metolachlor by etherification. The reaction yield of the second step of this method may be lower. Preparation method: 2-Ethyl-6-methylaniline and 2-bromo-1-methoxypropane are stirred at 120°C and 1.33×103Pa for 40h to give 2-ethyl-6-methyl-N-(1 '-Methoxy-propan-2-yl)aniline, then in the presence of triethylamine, add the benzene solution of the above intermediate dropwise to the chloroacetyl chlorobenzene solution, stir the reaction at room temperature for 2h, wash with water, dry, distill To get metolachlor.

Uses

A selective pre-emergence herbicide.Suitable for dry field crops such as corn, soybean, peanut, cotton, sorghum, etc.

Computed Properties

Molecular Weight:283.79
XLogP3:3.1
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
Complexity:285
Undefined Atom Stereocenter Count:1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Triethylamine

Benzene

Hydrochloric acid

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Metolachlor

CAS No.: 51218-45-2

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CAS No.: 51218-45-2

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Content: 99%

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