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Chlorothalonil

Chlorothalonil structure

CAS No:
1897-45-6
Formula:
C8Cl4N2
Chemical Name:
Chlorothalonil
Synonyms:
1,3-Benzenedicarbonitrile,2,4,5,6-tetrachloro-;Isophthalonitrile,tetrachloro-;2,4,5,6-Tetrachloro-1,3-benzenedicarbonitrile;DAC 2787;Daconil;Daconil 2787;Forturf;2,4,5,6-Tetrachloroisophthalonitrile;Termil;Chlorothalonil;Tetrachloroisophthalonitrile;Daconil 2787WP;1,3-Dicyanotetrachlorobenzene;Bravo 6F;Bravo;Chlorthalonil;TPN (pesticide);Nopcocide N 96;Sweep;TPN;Nopcocide;Dacosoil;Daconil F;2,4,5,6-Tetrachloro-1,3-dicyanobenzene;Bravo 500;Nopcocide 54DB;Thalonil;Daconil M;Tetrachlorobenzene-1,3-dicarbonitrile;Clortosip L;Nopcocide N 54D;2,4,5,6-Tetrachloro-1,3-isophthalonitrile;Vanox;Vanox 500SC;Vanox 750PM;Clortosip;Clortosip 500SC;Kavach;Bravo Ultrex;NexGen;Kabiguard 164SA;Bravonil;Nuocide 960;Daconil 500;Marincide C;Daconil 1000;Tuff-Brite;M 1;M 1 (mildewcide);Busan 1192;SD 404;Hortyl;Optimist;Bravonil Ultrex;Microban Additive M 15;Microban M 15;Agronil PI 231;Nuocide 404D;Fungitrol 404D;Bravo 720;Bravo Weather Stick;Kavach 75WP;Dakoflo;Bravo Plus;2,4,5,6-Tetrachloro-m-benzenedinitrile;Gwarant;Gwarant 500SC;Bravo 500SC;Guarant 500SC;Bravo Weather Stik;Chloronil;Chloronil 720;Blotch;2,4,5,6-Tetrachloroisophthalodinitrile;Daconil 50SC;YS 801 (mildewcide);YS 801;Fongil F;N 96;Barrack;Daconil Weatherstik;Daconil Weather Stik;Bravo 72SC;Daconil Ultrex;WS 098;37223-69-1;101963-73-9;216082-57-4;342632-51-3;462093-27-2
Categories:
Agrochemicals > Fungicides

Description

White Solid Chlorothalonil is a combustible, white, odorless, crystalline solidChEBI: A dinitrile that is benzene-1,3-dicarbonitrile substituted by four chloro groups. A non-systemic fungicide first introduced in the 1960s, it is used to control a range of diseases in a wide variety of crops.Chlorothalonil is a broad-spectrum organic fungicide mainly used to control fungi that threatens a number of agricultural crops, vegetables, trees, fruits, turf and paints, etc. It can also serves as a wood

Chlorothalonil Basic Attributes

Molecular Weight：

265.91

Exact Mass：

265.91

EC Number：

217-588-1

HScode：

29269090

Characteristics

PSA：

47.6

XLogP3：

3.05

Appearance：

White Powder

Density：

1.7 g/cm³ @ Temp: 25 °C

Melting Point：

250-251 °C

Boiling Point：

350 °C

Flash Point：

2 °C

Refractive Index：

1.633

Water Solubility：

Solubility in water, g/100ml at 25°C:

Storage Conditions：

0-6°C

Vapor Pressure：

Vapour pressure, Pa at 40°C:

Toxicity：

Oral-Rat LD50: 10000 mg/kg; Oral-Mouse LD50: 3700 mg/kg

Flammability characteristics：

Combustion produces toxic nitrogen oxides and chloride gases

Safety Information

Packing level：

Hazard category：

6.1(a)

Transport codes：

3276

wgk germany：

hazard class code：

26-37-40-41-43-50/53-36-20/21/22-11

safety instructions：

28-36/37/39-45-60-61-36/37-26-16

RTECS Number：

NT2600000

Marks：

T+;N,N,T+,Xn,F

Storage features：

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

Stability/Shelf Life：

It breaks down at pH 9, the rate following first-order kinetics at 1.8% per day (at 25 deg C). It has been shown that chlorothalonil is unstable to light when dissolved in benzene and that 2,3,5-trichloro-4,6-dicyanobiphenyl is a condensation product.

Precautionary statement(s)：

P260-P273-P280-P284-P304 + P340 + P310

Hazard Statements：

H317-H318-H330-H335-H351-H410

Toxicity

Toxicity class：

moderately toxic

Chlorothalonil Use and Manufacturing

Methods of Manufacturing

Ammonia oxidation The meta-xylene is carried into the reactor in a gaseous state, the liquid ammonia is preheated by evaporation and then the reactor, and the air is filtered and heat-exchanged to carry out the reactor to cause the ammonia oxidation reaction. The catalyst is silica gel as the carrier V-Cr as the main component, and the reactor is a fluidized bed. The generated m-dibenzonitrile is desublimated and continuously discharged. Exhaust gas is recovered in excess of ammonia or directly to the three wastes. After centrifugal dehydration and drying, the m-dibenzonitrile is obtained as a crude product with a content of 94% to 98% and a yield of ≥90%. Refining can adopt methods such as vacuum distillation, water washing or solvent extraction. The chlorinated isophthalonitrile is melted and sent to the vaporizer for vaporization or atomized directly with a part of the gas stream (N2) through the nozzle to carry out the reactor. After drying and preheating, chlorine gas is mixed with gaseous isophthalonitrile. Nitrogen gas is used as diluent gas for vaporization or atomization of isophthalonitrile and adjustment of reactant concentration. The reactor adopts fluidized bed or other forms. After the reaction, the gas enters the trap, and the chlorothalonil is precipitated and continuously sent out to be the product, and the yield is 90%. The tail gas is mainly chlorine, hydrogen chloride and nitrogen, which can be partially recycled or completely removed from the tail gas recovery and treatment system. Liquid carbon tetrachloride can also be sprayed into the trap. After contact with the reaction gas, chlorothalonil is precipitated. Carbon tetrachloride is vaporized and discharged together with the tail gas. After further cooling to -6℃, carbon tetrachloride is condensed and recycled.

Uses

Fungicide, bactericide, nematocide.Agricultural and horticultural fungicide.

Material

Benzonitrile

m-Xylene

Carbon dioxide

Activated charcoal

Hydrochloric acid

Ammonia

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