Product Identification

Product Name

Allethrin

Synonyms

(2-Methyl-4-oxo-3-prop-2-enyl-1-cyclopent-2-enyl) 2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropane-1-carboxylate
(RS)-3-Allyl-2-methyl-4-oxocyclopent-2-enyl (1R)-cis-trans-chrysanthemate
Cyclopropanecarboxylic acid, 2,2-dimethyl-3-(2-Methyl-1-propenyl)-,2-Methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-yl ester

CAS

584-79-2

Formula

C19H26O3

Molecular Weight

302.45

EINECS

209-542-4

RTECS

GZ1925000

RTECS Class

Agricultural Chemical and Pesticide; Mutagen

Beilstein/Gmelin

2294836

Beilstein Reference

3-09-00-00214

EC Index Number

006-025-00-3

EC Class

Harmful; Dangerous for the Environment

Physical and Chemical Properties

Appearance

A clear amber-colored viscous liquid.

Solubility in water

Insoluble

Melting Point

51

Boiling Point

387

Vapor Pressure

3E-6 (25 C)

Density

1.005 g/cm3 (25 C)

Partition Coefficient

4.78

Heat Of Vaporization

63.6 kJ/mol

Usage

Insecticide.

Refractive Index

1.5091 (17 C)

First Aid Measures

Ingestion

There is no specific antidote for pyrethrin poisoning. Treatment is symptomatic and supportive and includes monitoring for the development of hypersensitivity reactions with respiratory distress. Provide adequate airway management when needed. Gastric decontamination is usually not required unless the pyrethrin product is combined with a hydrocarbon. Allergic reaction: mild: antihistamines with or without epinephrine. Severe: oxygen, aggressive airway management, antihistamines, epinephrine (adult: 0.3 To 0.5 Ml of a 1:1000 solution subcutaneously; child: 0.01 Ml/kg; may repeat in 20 to 30 min), corticosteroids, ecg monitoring, and iv fluids.

Inhalation

Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Vitamin e topical application is highly effective in relieving paresthesias.

Eyes

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage

Pyrethrins with piperonyl butoxide topical preparations should be stored in well-closed containers at a temperature less than 40C, preferably between 15-30C.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion

Nausea, vomiting and abdominal pain commonly occur and develop within 10 to 60 minutes following ingestion.

Inhalation

Hypersensitivity reactions characterized by pneumonitis, cough, dyspnea, wheezing, chest pain, and bronchospasm may occur. Rare cases of respiratory failure and cardiopulmonary arrest have been reported.

Skin

Irritant and contact dermatitis may develop. Erythema which mimics sunburn has also been noted after prolonged repeated exposure.

Eyes

A stuffy, runny nose and scratchy throat following inhalational exposure may be noted.

Hazards

Containers may explode when heated. Runoff may pollute waterways.

UN (DOT)

2902

Exposure Controls/Personal Protection

Personal Protection

Employees should be provided with and required to use dust- and splash-proof safety goggles where pyrethroids may contact the eyes. Employees should be provided with and be required to use impervious clothing, gloves, and face shields (eight-inch minimum). Wear appropriate equipment to prevent: repeated or prolonged skin contact. Wear eye protection to prevent: reasonable probability of eye contact.

Respirators

Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive pressure mode

Poison Class

3

Fire Fighting Measures

Flash Point

166

Fire Fighting

Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)

Fire Potential

Slight fire hazard. Combustible

Accidental Release Measures

Small spills/leaks

Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Remove trapped material with suction hoses. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.

Stability and Reactivity

Stability

More stable towards UV light than natural pyrethrins decomposed by UV light. Hydrolyzed in alkaline media. Are stable for long periods in water-based aerosols where emulsifiers give neutral water systems.

Incompatibilities

Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products Reacts with many acids and bases liberating heat and flammable gases (e.g., H2) Reacts with reducing agents such as hydrides, alkali metals, and nitrides to produce flammable gas (H2) and heat Incompatible with isocyanates, aldehydes, cyanides, peroxides, and anhydrides Reacts violently with aldehydes, HNO3, HNO3 + H2O2, and HClO4.

Decomposition

When heated to decomposition it emits acrid fumes.

Combustion Products

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Transport Information

UN Number

2902

Hazard Class

6.1

Packing Group

I; II; III