allethrin (Pynamin) Chemical Profile 4/85
CHEMICAL NAME: Dl-3-allyl-2-methyl-4-oxocyclopent-2-enyl dl-cis/
trans chrysanthemate (56)
DEC INGRED. CODE:
TRADE NAME(S): Pynamin (1)
FORMULATION(S): Aerosols, oil sprays, dusts, and oils with or without
a synergist such as piperonyl butoxide (Butacide) for use in the
household. Also in emusifiable concentrates, wettable powders, oil base
and water base sprays (56).
TYPE: Synthetic pyrethrins-like
BASIC PRODUCER(S): McLaughlin Gormley King Co.
8810 Tenth Ave., N.
Minneapolis, MN 55427
STATUS: General use
PRINCIPAL USES: Not as effective against as wide a variety of insects as
pyrethrins. Used mainly in control of flies and mosquitoes in homes.
Used also in combinations for flying and crawling insects, farm sprays
for livestock, dairy sprays, and against fleas and ticks on dogs and
Important Pests Controlled: Mosquitoes, flies, aphids, Mexican bean
beetles, imported cabbage worms, mealy bugs, beetles, thrips, fleabeetle,
sod webworm, loopers, leafhoppers, lice, Colorado potato beetle and many
Allethrin is as toxic to insects as natural pyrethrins, but it has
longer residual effects (8a).
II. PHYSICAL PROPERTIES
MOLECULAR FORMULA: C19 H26 O3 (62)
MOLECULAR WEIGHT: 302.4 (62)
PHYSICAL STATE: Pale yellow to yellow-brown liquid (technical grade)
BOILING POINT: 140 C/0.1 mmHg (technical grade) (62)
VAPOR PRESSURE: 16 mPa at 30 C (technical grade) (62)
SOLUBILITY: Insoluble in water (56)
III. HEALTH HAZARD INFORMATION
OSHA STANDARD: None established
NIOSH RECOMMENDED LIMIT: None established
ACGIH RECOMMENDED LIMIT: None established
A. ACUTE TOXICITY
DERMAL: LD50 = >2500 mg/kg (rat) (62)
ORAL: LD50 (rat) = 1100 mg/kg (male), 685 mg/kg (female)
B. SUB-CHRONIC AND CHRONIC TOXICITY:
To be developed.
IV. ENVIRONMENTAL CONSIDERATIONS
Little or no hazard to birds, fish, and beneficial insects.
Relatively nonhazardous to honey bees. Biological magnification
unlikely. Nonphytotoxic (1).
LC50 (96-hr) is: for steelhead trout 17.5 mg/l; for channel catfish
30.1 mg/l (62).
Very toxic to cold blooded animals (8a).
Approximate Residual Period: Very short-lived on exposed surfaces and
in soil and water (1).
V. EMERGENCY AND FIRST AID PROCEDURES
The chemical information provided below has been condensed
from original source documents, primarily from "Recognition and
Management of Pesticide Poisonings", 3rd ed. by Donald P. Morgan,
which have been footnoted. This information has been provided in
this form for your convenience and general guidance only. In
specific cases, further consultation and reference may be required
and is recommended. This information is not intended as a sub-
stitute for a more exhaustive review of the literature nor for the
judgement of a physician or other trained professional.
If poisoning is suspected, do not wait for symptoms to develop.
Contact a physician, the nearest hospital, or the nearest Poison
FREQUENT SYMPTOMS AND SIGNS OF UNDUE EXPOSURE TO PYRETHRUM, PYRETHRINS,
PYRETHROIDS, AND PIPERONYL BUTOXIDE.
A STUFFY, RUNNY NOSE and scratchy throat from inhalation of partly
purified pyrethrum extract is the most common adverse effect of these
agents. Asthmatic WHEEZING may be precipitated by exposure of
predisposed individuals. Sudden bronchospasm, swelling of oral and
laryngeal mucous membranes, and shock (anaphylaxis) have been reported
after pyrethrum inhalation. Delayed appearance of dyspnea, cough and
fever, with patchy lung infiltrates on x-ray, suggest hypersensitivity
pneumonitis. Nervous irritability, tremors, and ataxia have occurred
rarely in persons who have had massive inhalation exposure to
pyrethrins. Halocarbon propellents in bug-bomb products present a risk
of CARDIAC ARRHYTHMIA and possibly fibrillation if inhaled to excess.
Hydrocarbons used as solvents in spray products are likely to result in
COUGH, FEVER, and CHEST PAIN (hydrocarbon pneumonitis) if these liquids
are inadvertently aspirated (25).
SKIN CONTACT: Wash with soap and water (25).
INGESTION: If large amounts of pyrethrin or pyrethroid formulation
have been ingested: If victim is alert and respirtion is not depressed,
give Syrup of Ipecac, followed by 1-2 glasses of water, to induce
vomiting (adults and children 12 years and older): 30 ml; children: 15 ml
NOTES TO PHYSICIAN:
If victim is not fully alert, empty stomach immediately by
intubation, aspiration, and lavage, using isotonic saline or 5% sodium
bicarbonate. Because many pesticides are dissolved in petroleum
distillates, emesis and intubation of the stomach involve a risk that
solvent will be aspirated, leading to chemical pneumonitis. Do not
administer or instill milk, cream, or other substances containing
vegetable or animal fats, which enhance absorption of lipophilic
substances, such as pyrethrins and pyrethroids.
Diazepam (Valium) 5-10 mg in adults, 0.1 mg/kg in children, given
orally or slowly IV, should control nervousness and tremors in rare
cases having these symptoms after extraordinary exposure to pyrethrins
and pyrethroids (25).
VI. FIRE AND EXPLOSION INFORMATION
To be developed.
Not compatible with Bordeaux, calcium arsenate, lime, lime sulfur,
and soaps. Ineffective in alkaline solutions. Not compatible with lead,
brass, copper, zinc or iron (8a).
VIII. PROTECTIVE MEASURES
PROTECTIVE CLOTHING: Goggles, gloves, and respirator should be used
when handling technical grade or 90%. None required for handling usual
products for home and industry (56).
IX. PROCEDURES FOR SPILLS AND LEAKS
IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
PESTICIDE TEAM SAFETY NETWORK/CHEMTREC
X. LITERATURE CITED
1. Harding, W.C. 1979. Pesticide profiles, part one: insecticides
and miticides. Univ. Maryland, Coop. Ext. Serv. Bull. 267.
8a. Thomson, W. T. 1976. Agricultural chemicals - book 1:
insecticides, acaricides, and ovicides. Revised ed. Thomson
Publ., Indianapolis, IN. 232 pp.
25. Morgan, D.P. 1982. Recognition and management of pesticide
poisonings, 3rd ed. U.S. Environmental Protection Agency,
Washington, DC. 120 pp.
56. Farm Chemicals Handbook, 70th ed. 1984. R. T. Meister, G. L.
Berg, C. Sine, S. Meister, and J. Poplyk, eds. Meister
Publishing Co., Willoughby, OH.
62. The Pesticide Manual: A World Compendium, 7th ed. 1983. C.R.
Worthing, ed. The British Crop Protection Council, Croydon,
England. 695 pp.