Bifenthrin

  • Bifenthrine
  • Biphenate
  • Biphenthrin
  • Biphentrin
  • 3-(2-Chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethylcyclopropanecarboxylate
  • Talstar
Formula
C23H22ClF3O2
Structure
Description
Off-white to pale tan waxy solid with a very faint slightly sweet odor.
Uses
Acaricide, insecticide.

Registry Numbers and Inventories.
CAS
82657-04-3
RTECS
GZ1227800
RTECS class
Agricultural Chemical and Pesticide
Merck
12,1257
Beilstein/Gmelin
4719810
EPA OPP
128825
Swiss Giftliste 1
G-89719
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
C23H22ClF3O2
Formula mass
422.87
Melting point, °C
51
Density
1.212 g/ml
Solubility in water
0.1 mg/L
Partition coefficient, pKow
> 6.00

Hazards and Protection.
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.
Protection
Employees should be provided with and required to use dust- and splash-proof safety goggles where pyrethroids may contact the eyes. Pyrethroids.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
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
Stable for two years at 25 C and 50 C technical bifenthrin pyrethrins. Are stable for long periods in water-based aerosols where emulsifiers give neutral water systems. Stable 21 days at pH 5-9 (21 C).
Incompatibilities
Avoid contact with strong oxidizers. Incompatible with lime and ordinary soaps because acids and alkalies speed up processes of hydrolysis.

Fire.
Flash Point,°C
165 (open cup)
Fire fighting
Use carbon dioxide, foam, or dry chemical on fires involving pyrethroids.

Health.
Poison_Class
2
Exposure effects
Mild central nervous system depression or excitation may occur after ingestion or vapor inhalation. CNS effects can occur secondary to hydrocarbon pneumonitis and hypoxia, or from additives and contaminants (aniline, heavy metals, camphor, or pesticides). Some hydrocarbons are simple asphyxiants (e.G., Methane, ethane, propane gasses) which can produce CNS effects secondary to hypoxia. In a prospective study in Toronto, major congenital malformations were noted in 13 of 125 fetuses of mothers exposed to organic solvents during pregnancy.
   Ingestion
Nausea, vomiting, diarrhea, and abdominal pain may occur following ingestion.
   Inhalation
Coughing, choking, tachypnea, dyspnea, cyanosis, rales, hemoptysis, pulmonary edema, pneumatoceles, lipoid pneumonia, or respiratory arrest may develop following ingestion and aspiration.
   Skin
Irritant and contact dermatitis may develop. Erythema which mimics sunburn has also been noted after prolonged repeated exposure.

First aid
 
   Ingestion
Pure petroleum distillates - gastric decontamination is not indicated in the majority of accidental ingestions, since systemic toxicity is unlikely from a pure petroleum distillate. Other hydrocarbons - gastric decontamination may be indicated if a large amount of a toxic hydrocarbon has been ingested (e.G., Suicide attempt) and if spontaneous vomiting has not occurred. Decontamination may also be indicated for ingestions of highly toxic hydrocarbons (e.G., Halogenated hydrocarbons, carbon tetrachloride) and for hydrocarbons which contain very toxic additives (e.G., Heavy metals, pesticides). The decision to decontaminate should be based on the toxicity of the agent, the volume ingested, time of ingestion and patient's clinical status. The potential for rapid cns depression, with seizures and/or respiratory depression, must be considered.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.
   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.

Transport.