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95% permethrin TC

Common name：permethrin

IUPAC name：3-phenoxybenzyl (1RS,3RS;1RS,3SR)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate

Roth: 3-phenoxybenzyl (1RS)-cis-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate

Chemical Abstracts name：

(3-phenoxyphenyl)methyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate

Chemical Structure:

M.f.：C₂₁H₂₀Cl₂O₃

Mol. wt.：391.3

CAS RN：[52645-53-1]

Physical Chemistry：Form Tech. is a yellow-brown to brown liquid, which sometimes tends to crystallise partly at room temperature.M.p. 34-35℃; cis- isomers 63-65℃; trans- 44-47℃B.p.200℃/0.1 mmHg; >290℃/760 mmHgV.p.cis- 0.0025 mPa; trans- 0.0015 mPa (both 20℃) KOW logP = 6.1 (20℃)S.g./density 1.29 (20 °C)Solubility In water 6×10-3 mg/l (pH 7, 20℃). In xylene, hexane >1000, methanol 258 (all in g/kg, 25℃).Stability Stable to heat (≥2 y at 50℃), more stable in acidic than alkaline media with optimum stability c. pH 4; DT5050 d (pH 9), stable (pH 5, 7) (all 25 °C). Some photochemical degradation observed in laboratory studies, but field data indicate this does not adversely affect biological performance.F.p. >100℃ ('Perigen')

Applications：Non-systemic insecticide with contact and stomach action, having a slight repellent effect.A contact insecticide effective against a broad range of pests. It controls leaf- and fruit-eating Lepidoptera and Coleoptera in cotton, at 100-150 g a.i./ha, in fruit, at 25-50 g/ha, in tobacco, vines and other crops, at 50-200 g/ha, and in vegetables, at 40-70 g/ha. It has good residual activity on treated plants. It is effective against a wide range of animal ectoparasites, provides >60 d residual control of biting flies in animal housing, at 200 mg a.i. (as EC)/m2 wall or 30 mg a.i. (as WP)/m2 wall, and is effective as a wool preservative, at 200 mg/kg wool. It provides >120 d control of Blattodea, Diptera, Hymenoptera and other crawling insects, at 100 mg a.i. (as WP)/m2, also flying insects.

Toxicology：Oral Oral LD50 values of permethrin depend on such factors as: carrier, cis/trans ratio of the sample, the test species, its sex, age and degree of fasting; values reported sometimes differ markedly. Values for a cis/trans ratio of c. 40:60 are: for rats 430-4000, mice 540-2690 mg/kg; with a 20:80 ratio, the LD50is c. 6000 mg/kg.Skin and eye Acute percutaneous LD50 for rats >2500, rabbits >2000 mg/kg. Mild eye and skin irritant (rabbits). Moderate skin sensitiser.Inhalation LC50 (3 h) for mice and rats >685 mg/m3 air; (separate study gives >13800 mg/m3). Birds Typical oral LD50values for a cis/trans ratio of c. 40:60 are: for chickens >3000, mallard ducks >9800, Japanese quail >13 500 mg/kg.Fish LC50 (96 h) for rainbow trout 2.5 mg/l; (48 h) for rainbow trout 5.4, bluegill sunfish 1.8 mg/l.Daphnia LC50 (48 h) 0.6mg/l.Bees Toxic to bees. LD50(24 h) (oral) 0.098mg/bee; (topical) 0.029mg/bee.

Specification：95%TC