Product name: permethrin
Chemical name: (1RS,3RS;1RS,3SR)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
Roth: 3-phenoxybenzyl (1RS)-cis-trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate
3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate
CAS number.: 52645-53-1
Molecular formula: C21H20Cl2O3
Molecular weight: 391.29

PROPERTIES
Technical: ≥93%
Appearance: yellow-brown to brown liquid
M.p. 34-35 ºC; cis- isomers 63-65 ºC; trans- 44-47 ºC 
B.p. 200 ºC/0.1 mmHg; >290 ºC/760 mmHg 
V.p. cis- 0.0025 mPa; trans- 0.0015 mPa (both 20 ºC) (D. Wells et al., Pestic. Sci., 1986, 17,473)
KOW logP = 6.1 (20 ºC) 
S.g./density 1.29 (20 °C) 
Solubility In water 6 ´ 10-3 mg/l (pH 7, 20 ºC). In xylene, hexane >1000, methanol 258 (all in g/kg, 25 ºC). 
Stability Stable to heat (³2 y at 50 ºC), more stable in acidic than alkaline media with optimum stability c. pH 4; DT50 50 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 ºC ('Perigen')

APPLICATIONS
Mode of action Non-systemic insecticide with contact and stomach action, having a slight repellent effect.
Uses 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.
Phytotoxicity Non-phytotoxic when used as directed (except that some ornamentals may be injured).

Irritation
Eye irritation: Slight irritating.
Skin irritation: Slight irritating.
Sensitisation: Non sensitising.
Long term toxicity: Non teratogenic, non mutagenic, non carcinogenic.
PACKAGING
PVF-lined Steel drums, standard size (net weight) -- 25 kg.