Pyrethrins (technical)
pyrethrum-extract
CAS: 8003-34-7
Molecular Formula: C43H56O8
Pyrethrins (technical) - Names and Identifiers
| Name | pyrethrum-extract |
| Synonyms | PYRETHRINS Pyrethrins (te Nature Pyrethrins pyrethrum-extract Pyrethrins (technical) PTEROSTILBENE(FG)(CALL) pyrethrins, including cinerins (5-methyl-4-oxo-3-penta-2,4-dienyl-1-cyclopent-2-enyl) 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate (1R,3R)-2,2-Dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylic acid (S)-2-methyl-4-oxo-3-(2,4-pentadienyl)-2-cyclopenten-1-yl (1R,3R)-2,2-Dimethyl-3-(2-methyl-1-propenyl)cyclopropanecarboxylic acid (S)-2-methyl-4-oxo-3-(2,4-pentadienyl)-2-cyclopenten-1-yl ester |
| CAS | 8003-34-7 |
| EINECS | 232-919-8 |
| InChI | InChI=1/C21H28O3/c1-7-8-9-10-15-12-17(14(4)19(15)22)24-20(23)18-16(11-13(2)3)21(18,5)6/h7-9,11-12,14,16-18H,1,10H2,2-6H3 |
| InChIKey | VXSIXFKKSNGRRO-YWUDCVDHSA-N |
Pyrethrins (technical) - Physico-chemical Properties
| Molecular Formula | C43H56O8 |
| Molar Mass | 700.9 |
| Density | 0.84-0.86 g/cm3 |
| Boling Point | 421.7°C at 760 mmHg |
| Flash Point | 75°C |
| Water Solubility | 0.2 (pyrethrin I) and 9 (pyrethrin II) mg l-1(ambient temp.) |
| Vapor Presure | 2.7×10-3 (pyrethrin I) and 5.3×10-5(pyrethrin II) Pa |
| Appearance | neat |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.45 |
Pyrethrins (technical) - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S13 - Keep away from food, drink and animal foodstuffs. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2810 6.1/PG 3 |
| WGK Germany | 3 |
| RTECS | UR4200000 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
| Toxicity | The six insecticidal constituents of the extract of the pyrethrum flowers Pyrethrum (Chrysanthemum cinerariaefolium). Pyrethrins I and II are most prominent, existing in the ratio 71:21:7 for pyrethrin (I and II), cinerin (I and II), jasmolin (I and II). Pyrethrins are potent, nonsystemic, contact insec_x0002_ticides, causing rapid paralysis or knockdown and death at a later stage in a variety of insects. They exhibit low vertebrate toxicity with an acute oral LD50 in rats of 1.2 g/kg. The mechanism of action involves modification of nerve membrane Na1 channels. Opening and closing of the Na1 channel is slowed, resulting in increased Na1 permeability and depolarization leading to hyperexcitability. Symptoms in humans include gastrointestinal irritation, nausea, vomiting, diarrhea, numbness of tongue and lips, syncope, hyperexcitability, incoordination, convulsions, muscular paralysis, collapse and death due to respiratory paralysis. Treatment involves gastric lavage, emetics, cathartics, demulcents, artificial respiration if necessary and short-acting barbiturates for convulsions. |
Pyrethrins (technical) - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| insecticide | pyrethroid is the main raw material for the preparation of mosquito incense, and is the insecticidal active ingredient contained in pyrethrum, a perennial herb of Asteraceae. There are mainly pyrethrins I and II, in addition, there are a small amount of similar structure of the leaf pyrethroid I, leaf pyrethroid II and so on. Various synthetic pyrethroid-like compounds have been used as insecticides, collectively referred to as pyrethroids. Pyrethrins are yellow viscous oily liquids with a fragrance. Insoluble in water, soluble in a variety of organic solvents. Unstable, in case of alkali decomposition failure, in strong light or high temperature decomposition failure. The main dosage forms are powder, emulsifiable concentrate, aerosol, oil, mosquito coil and so on. Has a strong contact killing effect, insecticidal spectrum. Short residual period. Mainly used for the prevention and control of health pests, livestock pests. Very safe for humans and animals, no damage to plants, no residue, no pollution of agricultural products and the environment of botanical pesticides. Safe for warm-blooded animals. The intensity of toxicity to insects, with the strongest pyrethroid, pyrethroid 1 times, pyrethroid II again, pyrethroid II the weakest. FAO/WHO recommends a daily allowance of 0.04mg/kg body weight (including other pyrethroids). Rats were orally administered 1500mg/kg. Maximum allowable concentration in food: 1.0mg/kg for fruits and vegetables (including pyrethroid I) in Sweden; 3 mg/kg for fish (dry) and unprocessed grains recommended by FAO/WHO, dried fruits, dried vegetables, fresh fruits and vegetables, peanut, stone fruit is 1 mg/kg (including other pyrethroids). |
| pyrethroids and pyrethroids | pyrethroids are extracts of dried chrysanthemum because they are stable under heat and light conditions, so it is mainly used for indoor pesticides. Some shampoos that kill head lice also contain pyrethroids. Pyrethroids are artificially synthesized on the basis of pyrethroid structure and biological activity, and their stability has been increased. They are mainly divided into type I and type II, and the toxicity of type II is greater than that of type I. Synthetic pyrethroids are used primarily in agriculture and horticulture to kill construction pests (e. G., termites), lice, and fleas. Pyrethroids and synthetic pyrethroids can rapidly penetrate into the body of a pest and paralyze it. Permethrin is a pyrethroid insecticide that does not contain a cyano structure. It is the first photostable insecticide in pyrethroid pesticides that is suitable for controlling agricultural pests. |
| pyrethroid poisoning | pyrethrum is the dried inflorescence of pyrethrum of Compositae family, containing about 1% pyrethroid, with good insecticidal effect, knock-down fast, low toxicity and other advantages. In recent years, synthetic pyrethroid analogs have the advantages of wide insecticidal spectrum, low toxicity to humans and animals, and less environmental residues, so they are called pyrethroid insecticides. This kind of insecticide is a nerve agent. At present, there are more than 20 kinds of practical products on the market, and deltamethrin, fenvalerate, cypermethrin, permethrin, amithrin and so on are mainly used in China. They are all moderately toxic products with high oral absorption toxicity. This class of insecticides contains a pyrethroid synergist (P-450 cytochrome inhibitor). Domestic insecticides are mixtures of pyrethroids with other ingredients. Pyrethrins are low toxicity insecticides, but with other insecticides, such as insecticidal chrysanthemum, etc., can significantly enhance its toxicity, or extend the half-life of the drug. This class of pesticides inhalation toxicity. poisoning mechanism: pyrethroids can cause mild depolarization of nerve cell membrane, increase the potential after recovery, cause repetitive discharge, affect Na + and K + channels, and block the motor potential to cause poisoning. Pyrethroid synergist can inhibit and delay the metabolism of pyrethroid in the body, enhance its toxicity and prolong the duration of drug action in the body to improve the efficacy. |
| category | pesticide |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 200 mg/kg; Oral-mouse LD50: 370 mg/kg |
| flammability hazard characteristics | flammable; Spicy and irritating smoke released from fire scene |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| extinguishing agent | dry powder, foam, sand |
| Occupational Standard | TWA 5 mg/m3; Tel 10 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentrations | 5,000 mg/m3 |
Last Update：2024-04-09 20:44:15
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