Product Identification

Product Name

alpha-Cypermethrin

Synonyms

3-(2,2-Dichloroethenyl)- 2,2-dimethylcyclopropanecarboxylate
Alfamethrin
Alphamethrin
Bestox
Concord
Phenoxybenzyl-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane carboxylate

CAS

67375-30-8

Formula

C22H19Cl2NO3

Molecular Weight

416.32

EINECS

257-482-9

RTECS

GZ1251400

RTECS Class

Agricultural Chemical and Pesticide; Mutagen

Beilstein/Gmelin

2228066

EC Index Number

607-422-00-X

Physical and Chemical Properties

Appearance

Viscous yellowish brown semisolid mass.

Solubility in water

0.01 mg/L @ 25 C

Melting Point

78-81

Boiling Point

200 (0.07 torr)

Vapor Pressure

.00002

Density

1.28 g/cm3 (22C)

Partition Coefficient

6.94

Usage

Insecticide.

Refractive Index

1.5622 (20 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.

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. Any supplied-air respirator with a full face piece and operated in pressure-demand or other positive pressure mode in combination with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive pressure mode.

Fire Fighting Measures

Flash Point

>80 (closed cup)

Fire Fighting

Use carbon dioxide, foam, or dry chemical on fires involving pyrethroids.

Accidental Release Measures

Small spills/leaks

Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.

Stability and Reactivity

Incompatibilities

Avoid contact with strong oxidizers. Incompatible with lime and ordinary soaps because acids and alkalies speed up processes of hydrolysis.

Stability

Very stable in neutral and acidic media. Hydrolyzed in strongly alkaline media. Thermally stable up to 220 C. Field data indicate that in practice it is stable to air and light. Are stable for long periods in water-based aerosols where emulsifiers give neutral water systems.