Pyrethrum

  • Cinerin I or II
  • Jasmolin I or II
  • Pyrethrin i or iI
  • Pyrethrum i or iI
  • Pyrethroid
Formula
Unspecified
Description
Refined extract is pale yellow mobile oil; unrefined extract is a dark characteristic odor of carrier.
Uses
Insecticide.

Registry Numbers and Inventories.
CAS
8003-34-7
EC (EINECS/ELINCS)
232-319-8
RTECS
UR4200000
RTECS class
Agricultural Chemical and Pesticide; Reproductive Effector; Human Data; Natural Product
Beilstein/Gmelin
NA
EPA OPP
69002
Canada DSL/NDSL
DSL
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Density
0.84-0.86 g/cm3 (25% pale extract)
Solubility in water
Insoluble

Hazards and Protection.
Storage
Keep in well ventilated area. Should be kept cool. Liquid extracts should be kept in dark and away from lead, zinc, and brass.
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
Wear appropriate eye protection and protective clothing to prevent skin and 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 facepiece 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.
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.
Incompatibilities
Avoid contact with ontact with strong oxidizers may cause fires and explosions. Not compatible with alkaline material. Incompatible with lime and ordinary soaps because acids and alkalies speed up processes of hydrolysis.
Decomposition
When heated to decomposition it emits acrid smoke and irritating fumes. Pyrethrins are decomposition by exposure to light with loss of insecticidal activity.

Fire.
Flash Point,°C
76
Fire fighting
Self-contained breathing apparatus, rubber gloves, hats, suits and boots must be worn. Highly toxic fumes are imminent.
Fire potential
Nonflammable.
Health
2
 
Flammability
1
 

Health.
Exposure limit(s)
NIOSH REL: TWA 5 mg/m3 OSHA PEL: TWA 5 mg/m3 IDLH 5000 mg/m3
Exposure effects
   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.

First aid
 
   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.

Transport.
USCG CHRIS Code
PRR