Active ingredient

Common name

pyrethrin

Chemical name

[1R-[1a[S*(Z)],3b]]-2-methyl-4-oxo-3-(2,4-pentadienyl)cyclopenten-1-yl 2,
2-dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylate;

CAS No

121-21-1

Molecular Formula

pyrethrin I:; cinerin I: C20H28O3; jasmolin I: C21H30O3

Pesticide category

Insecticide

Analytical method

Products and extracts of flowers analysed by glc with FID (CIPAC
Handbook, 1985, 1C, 2209; ibid., 1998, H, 239; AOAC Methods, 17th Ed.,
982.02*; D. B. McClellan, Anal. Methods Pestic. Plant Growth Regul., 1972, 6, 461;
J. Sherma, ibid.ATXht0 , 1976, 8, 225); or by a titrimetric method (AOAC
Methods, 17th Ed., 936.05). Residues determined by colorimetry or by glc(J. Sherma,
loc. cit.; R. Mestres et al. , Ann. Falsif. Expert. Chim., 1979, 72, 577;
W. Specht & M. Tillkes, Fresenius' Z. Anal. Chem., 1980, 301, 300).

Mode of Action

Non-systemic insecticide with contact action. Causes rapid knockdown (caused
mainly by Pyrethrins II), with death occurring later (associated with Pyrethrins I).
Has some acaricidal activity

Characteristics and Uses

Control of a wide range of insects and mites in public health, stored products, animal
houses, and on domestic and farm animals. Control of chewing and sucking insects
and spider mites on fruit, vegetables, field crops, ornamentals, glasshouse crops,
and house plants.Also used as personal insect repellents and for human head lice
control.Normally combined with synergists, e.g. piperonyl butoxide, which slows
down detoxification by the insects.

Toxicity

Oral Acute oral LD50 for male rats 2370, female rats 1030, mice 273-796 mg / kg .
Skin and eye Acute percutaneous LD50 for rats >1500, rabbits 5000 mg/kg.
Slightly irritating to skin and eyes. Constituents of the flowers may cause dermatitis
to sensitised individuals, but are removed during the preparation of refined extracts.
Inhalation LC50 (4 h) for rats 3.4 mg /l.

Formulation

Product name

pyrethrum 2% extract

Specifications

Packaging

For liquid formulations: 200L/drum, 25L/drum, 20L/drum, 5L/drum, 1L/bottle,
500ml/bottle, 250ml/bottle, 100ml/bottle, 50ml/bottle, For solid formulations:
25kg/drum or bag, 10kg/bag, 1kg/alu.bag, 500g/alu.bag, 250g/alu.bag, 100g/alu.bag,
50g/alu.bag or packing according to customers demand.