aspon Chemical Profile 4/85
CHEMICAL NAME: O,O,O',O'-tetrapropyl dithiopyrophosphate (62)
DEC INGRED. CODE:
TRADE NAME(S): Aspon (56)
FORMULATION(S): Emulsifiable concentrate (6 lbs/gallon), granule
TYPE: Organophosphate insecticide
BASIC PRODUCER(S): Stauffer Chemical Co.
Agricultural Chemical Division
Westport, Connecticut, 06880
STATUS: General use
PRINCIPAL USES: Highly effective for control of chinch bugs and sod
webworms in lawns and turf (56).
A high initial kill is obtained. Usually 95% kill within 48 hours
can be expected. Control lasts 60-90 days (8a).
II. PHYSICAL PROPERTIES
MOLECULAR FORMULA: C12 H28 O5 P2 S2 (62)
MOLECULAR WEIGHT: 378.4 (62)
PHYSICAL STATE: Straw to amber-colored liquid (technical product,
93-96% pure) (62)
ODOR: Faint aromatic odor (technical product) (62)
BOILING POINT: c. 170 C/1 mmHg (technical product) (62)
VAPOR PRESSURE: c. 13 mPa at 25 C (technical product) (62)
SOLUBILITY: 30 mg/l water at 20 C (technical product) (62)
II. HEALTH HAZARD INFORMATION
OSHA STANDARD: None established
NIOSH RECOMMENDED LIMIT: None established
ACGIH RECOMMENDED LIMIT: None established
A. ACUTE TOXICITY
DERMAL: LD50 = >2000 mg/kg, mildly irritating to skin (rabbit)
Nonirritating to the skin of rabbits (29a)
ORAL: LD50 (albino rat) = 2800 mg/kg (male), 740 mg/kg
EYES: Nonirritating to the rabbit eye (29a).
B. SUBACUTE AND CHRONIC TOXICITY:
In 90-day feeding trials at sublethal rates, rats showed depression
of red blood cell cholinesterase (62).
IV. ENVIRONMENTAL CONSIDERATIONS
Some hazard to birds, fish, and beneficial insects. Keep children
and pets off treated areas until pesticide has been washed into soil
and lawn or turf is dry (1).
Approximate Residual Period: 2-6 months in soil (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 POISONING BY ORGANOPHOSPHATE PESTICIDES
Symptoms of acute poisoning develop during exposure or within 12
hours (usually within four hours) of contact. HEADACHE, DIZZINESS,
WEAKNESS, INCOORDINATION, MUSCLE TWITCHING, TREMOR, NAUSEA, ABDOMINAL
CRAMPS, DIARRHEA, and SWEATING are common early symptoms. Blurred or
dark vision, confusion, tightness in the chest, wheezing, productive
cough, and PULMONARY EDEMA may occur. Incontinence, unconsciousness
and convulsions indicate very severe poisoning. SLOW HEARTBEAT,
salivation, and tearing are common. TOXIC PSYCHOSIS, with manic or
bizarre behavior, has led to misdiagnosis of acute alcoholism. Slowing
of the heartbeat may rarely progress to complete sinus arrest.
RESPIRATORY DEPRESSION may be fatal. Continuing daily absorption of
organophosphate at intermediate dosage may cause an INFLUENZA-LIKE
ILLNESS characterized by weakness, anorexia, and malaise (25).
SKIN CONTACT: Bathe and shampoo victim with soap and water if
there is any chance that skin and hair are contaminated (25).
INGESTION: If victim is alert and respiration is not depressed,
give Syrup of Ipecac followed by 1-2 glasses of water to induce vomiting.
Adults (12 years and over): 30 ml; children: 15 ml (25).
INHALATION: Remove from contaminated atmosphere. If breathing has
ceased, clear the victim's airway and start mouth-to-mouth artificial
respiration. Contact a physician immediately (29a).
EYE CONTACT: Immediately flush the eyes with large quantities of
running water for a minimum of 15 minutes. Hold the eyelids apart
during the irrigation to ensure flushing of the entire surface of the
eye and lids with water. Continue the irrigation for an additonal 15
minutes if the physician is not immediately available (29a).
NOTES TO PHYSICIAN:
Administer ATROPINE SULFATE intravenously, or intramuscularly, if IV
injection is not possible.
In MODERATELY SEVERE poisoning: Adult dosage: 0.4-2.0 mg repeated
every 15 minutes until atropinization is achieved: tachycardia (pulse
of 140 per minute), flushing, dry mouth, dilated pupils. Maintain
atropinization by repeated doses for 2-12 hours or longer depending on
severity of poisoning.
Dosage for children under 12 years: 0.05 mg/kg body weight, repeated
every 15 minutes until atropinization is achieved. Maintain
atropinization with repeated dosage of 0.02-0.05 mg/kg.
SEVERELY POISONED individuals may exhibit remarkable tolerance to
atropine; two or more times the dosages suggested above may be needed.
Administer PRALIDOXIME (Protopam (TM)-Ayerst, 2-PAM) in cases of severe
poisoning in which respiratory depression, muscle weakness and
twitchings are severe.
Adult dosage: 1.0 gm intravenously at no more than 0.5 gm per minute.
Child's dose (under 12 years): 20-50 mg/kg (depending on severity of
poisoning) intravenously, injecting no more than half the total dose
per minute. Dosage of pralidoxime may be repeated in 1-2 hours, then
at 10-12 hour intervals if needed. In very severe poisoning, dosage
rates may be doubled (25).
VI. FIRE AND EXPLOSION INFORMATION
Wear full face self-contained breathing apparatus and impervious
clothing (gloves, hats, safety goggles, suits and boots) of rubber.
Personnel exposure must be prevented and nonessential personnel
evacuated from the immediate area. Aspon may decompose under fire
conditions to give off toxic irritants. If containers are not leaking,
keep cooled with a water spray (29a).
Ordinarily not mixed with other materials (1).
VIII. PROTECTIVE MEASURES
STORAGE AND HANDLING: Containers should be stored in a cool, dry,
ventilated area away from flammable materials, sources of heat and flame,
and food stuffs (29a).
PROTECTIVE CLOTHING: Dermal contact and exposure must be prevented
through the use of protective clothing, gloves, and footwear.
Chemical safety goggles must be worn whenever a potential for eye contact
PROTECTIVE EQUIPMENT: Where there is a possibility of exposure to
vapor, aerosol, or mist, inhalation exposure can be controlled through
the use of a NIOSH-MESA approved pesticide respirator with an organic
vapor filter in combination with a particulate pre-filter (29a).
IX. PROCEDURES FOR SPILLS AND LEAKS
IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
PESTICIDE TEAM SAFETY NETWORK/CHEMTREC
A small spill can be handled routinely considering the physical
and hazardous properties of the product as well as the location of the
spill. Use adequate ventilation and wear an air supplied respirator to
prevent inhalation contact. Wear protective clothing to prevent skin
and eye contact. Soak up pooled liquid as follows:
1. Spread a suitable absorbent such as clay on the liquid.
2. Place sweepings in an open drum.
3. Generously cover the contaminated area with a common household
detergent (e.g. TIDE (TM)). Using a stiff brush, work the
detergent into the spill material, forming a slurry. Brush the
slurry into cracks and crevices; and allow to stand for 2 to 3
minutes. Be careful to completely avoid skin or eye contact; do
not splatter on one's self or bystanders.
4. Spread absorbents on the slurried liquid, and shovel the absorbed
material into an open drum.
5. Repeat if necessary.
6. Flush the area with water, while observing proper environmental
7. Seal drum and dispose of contaminated material in an approved
8. This product is toxic to birds, fish, and other wildlife. Do not
contaminate water by cleaning of equipment or disposal or wastes.
Larger spills must be handled according to a predetermined plan (29a).
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.
29a. Stauffer Chemical Company. 1978. Product safety information:
Aspon technical. Westport, CT.
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.