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Clofentezine Fungicide

Posted at: Offers to Sell and Export | Posted on: Fri 18 Jun, 2010 8:13 am | Product Category: Fungicides [22]
clofentezine fungicide
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Common name: clofentezine

IUPAC name: 3, 6-bis(2-chlorophenyl)-1, 2, 4, 5-tetrazine

Chemical Abstracts

name: 3, 6-bis(2-chlorophenyl)-1, 2, 4, 5-tetrazine

Cas rn: [74115-24-5]

Physical chemistry

Mol. wt.: 303.1; M.f.: C14H8Cl2N4; Form Magenta crystals. M.p.: 182.3 C; V.p.: 1.3x10-4 mPa (25 C) (gas saturation and glc). KOW: logP = 4.1 (25 C). Henry: 1.97x10-4 Pa m3 mol-1 (calc.) S.g./density: 1.51 (20 C). Solubility: In water 2.5 ug/l (pH 5, 22 C). In dichloromethane 37, acetone 9.3, hexane 1, ethanol 0.5 (all in g/l, 25 C). Stability: The a.i. and formulated products are stable to light, heat and air; on hydrolysis (22 C), DT50 248 h (pH 5), 34 h (pH 7), 4 h (pH 9). F.p.: Low flammability.


Mode of action: Specific acaricide with contact action, and long residual activity. Inhibits embryo development.

Uses: Control of eggs and young motile stages (but not adults) of Panonychus ulmi and Tetranychus spp. on pome fruit and stone fruit (20 g/hl), citrus fruit (12.5-20 g/hl), nuts, vines (20 g/hl), hops, strawberries (200-300 g/ha), cucurbits (100-400 g/ha), cotton (150-250 g/ha), and ornamentals (20-30 g/hl). Has no effect on predatory mites or beneficial insect species.

Phytotoxicity: May cause slight injury to glasshouse roses. May cause a slight pink deposit on petals of white or pale flowers.

Formulation types: SC; WP.

Mammalian toxicology

Oral: Acute oral LD50 for rats >5200 mg/kg.

Skin and eye: Acute percutaneous LD50 for rats >2100 mg/kg. Mild eye and skin irritant. Inhalation LC50 (4 h) for rats >9 mg/l air.

NOEL: (2 y) for rats 40 mg/kg diet; (1 y) for dogs 50 mg/kg diet.

ADI: 0.02 mg/kg b.w.

Toxicity class: WHO (a.i.) III (Table 5); EPA (formulation) III


Birds: Acute oral LD50 for mallard ducks >3000, bobwhite quail >7500 mg/kg. Dietary LC50 (8 d) for mallard ducks and bobwhite quail >2000 mg/kg diet.

Fish: LC50 (96 h) for rainbow trout >0.015, bluegill sunfish >0.25 mg/l (limits of solubility).

Daphnia: LC50 (48 h) >1.45 ug/l (limit of solubility).

Algae: Not toxic to Scenedesmus panonicus up to limit of solubility.

Bees: Acute LD50 (oral) >20 ug/bee; LC50 (contact) >1500 ppm.

Environmental fate

Animals: In mammals, undergoes metabolism by hydroxylation and exchange of the chlorine atoms on the rings for methylthio groups. Following oral administration, excretion occurs within 24-48 hours in the urine and faeces.

Plants: In metabolism studies, unchanged clofentezine was the major extractable residue. Trace amounts (4%) of 2-chlorobenzonitrile, the major photodegradation product, were also detected.

Soil/Environment: In soil, the major degradation route leads to 2-chlorobenzoic acid, and finally to CO2. DT50 in soil 65-85 d (15 C), 28-56 d (25 C), depending upon soil type. However, in laboratory studies, no leaching occurs. In water, 2-chlorobenzonitrile is the major product formed by hydrolysis and photodegradation, with smaller amounts of other compounds. Low solubility in water makes determination of soil adsorption constants difficult.

Company Contact:

No member photo
Contact Name: Kevin Xu
Company Name: Shanghai Skyblue Chemical Co., Ltd.
Email: Email
Tel: 86-21-58356613
Fax: 86-21-58358362
Street Address: Rm 15A02, Changhang
Mansion, No.800, Zhangyang Road,
Pudong, Shanghai, 200122, China
Website: http://www.skybluechem.com
Member name: skybluechem
Country: China-CN China
Member Since: 17 June 2010
Total Leads: 76 skybluechem Import Export Business Leads
Business focus: Piperonyl Butoxide, D-allethrin, Diethyltoluamide, Cartap, Tetramethrin, Atrazine, Quizalofop-p-ethyl, Tribenuron-methyl, Acetochlor, Ametryn, Simazine
Verify: Safe Import Export Tips
Product Category: Fungicides [22]

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