Tebuconazole 97% TC(CAS:80443-41-0)--hot bio pesticide/fungicide

Common name

Chlorothalonil

Chemical name

2,4,5,6-tetrachloro-1,3-benzenedicarbonitrile

CAS No

1897-45-6

Molecular formula

C8N2Cl4

Description

1.Melting Point:250-251(°C)

2.Boiling Point: (°C) 350 (760 mmHg)

3.Molecular weight::265.91

4.Solubility:in water(mg/litre): 0.6-1.2 at 25°C;

in organic(G/Liter): Acetone 20, dimethylformamide 30,

dimethylsulfoxide 20, xylene 80,

5.Stability:Stable under the condition of cold storage ,

weak base or weak acidic medium and light ,decompose in strong alkali medium

6.Appearance:white crystalline solid powder

Toxicity

Oral:Acute oral LD50 for rats >5000 mg/kg.

Skin and eye:Acute percutaneous LD50 for albino rabbits >10 000 mg/kg.

Severe eye irritant; mild skin irritant (rabbits). Evidence in humans

of contact dermatitis

Inhalation:LC50 (1 h) for rats >4.7 mg/l air; (4 h) for rats (nominal concentration)

0.6 mg/l air; (4 h) for rats (actual) 0.10 mg/l air

NOEL:Chronic administration of chlorothalonil has been associated

with tumour formation in the kidney and forestomach of rats and male mice.

The mechanism has been demonstrated to be epigenetic with a NOEL of 1.8

in rats and 1.6 in mice. In dogs, the pattern of toxicity is different from that in

rodents, with a NOEL of at least 3 mg/kg b.w. (JMPR 1990)

Toxicity class:WHO (a.i.) III (Table 5); EPA (formulation) II ('Bravo' SC )

EC hazard Xn; R40

ADI:(JMPR) 0.03 mg/kg [1994]

Mode of action

Non-systemic, broad-spectrum, foliar action with some protectant properties.

Acts by preventing spore germination and zoospore motility

Function

Control of many fungal diseases in a wide range of crops, including pome fruit,

stone fruit, citrus fruit, bush and cane fruit, cranberries, strawberries,

pawpaws, bananas, mangoes, coconut palms, oil palms, rubber, pepper,

vines, hops, vegetables, cucurbits, tobacco, coffee, tea, rice, soya beans,

peanuts, potatoes, sugar beet, cotton, maize, ornamentals, mushrooms,

and turf. Application rates for food crops are 1-2.5 kg/ha.

Controlling spectrum

Chlorothalonil is used predominantly on rice, wheat, peanuts,

potatoes and tomatoes, and many other crops. It is also used on golf

courses and lawns and as a preservative additive in some paints resins,

emulsions, and coatings.