diethatyl ethyl (Antor) Herbicide Profile 3/85
CHEMICAL NAME: N-chloroacetyl-N-(2,6-diethylphenyl)-glycine ethyl
TRADE NAME(S): Antor (58)
FORMULATION(S): Emulsifiable concentrate, 4 lbs/gal (56)
BASIC PRODUCER(S): BFC Chemicals, Inc.
4311 Lancaster Pike
P.O. Box 2867
Wilmington, DE 19805
STATUS: General use
PRINCIPAL USES: Diethatyl ethyl is a selective preemergence
herbicide with activity against many annual grasses and some
broadleaved weeds. Tolerant crops are alfalfa (established), carrots,
cole crops, cotton, dry beans, flax, lima beans, peanuts, peas,
potatoes, red beets, southern peas, soybeans, spinach, sugar beets, and
tomatoes (transplanted) (58).
APPLICATION METHOD(S): Preplant incorporated at preemergence (58).
Important Weeds Controlled: Barnyardgrass, blackgrass, annual
bluegrass, crabgrass, panicum, foxtails, ground cherry, lovegrass,
nightshade, pigweed, purslane, ryegrass, shepherd's purse, sowthistle,
and others (8b).
If applied preemergence rainfall is required to move it into the
soil. Absorbed by the emerging shoots as they grow through the treated
soil. Very limited postemergence activity (8b).
II. PHYSICAL PROPERTIES
MOLECULAR FORMULA: C16 H22 NO3 Cl (58)
MOLECULAR WEIGHT: 311.5 (58)
PHYSICAL STATE: White crystalline solid (pure compound) (58)
MELTING POINT: 49 to 50 C (pure compound) (58)
DECOMPOSITION TEMPERATURE: Thermally stable at 240 C. Significant
volatilization above 150 C (pure compound)
VAPOR PRESSURE: 3.2 x 10-6 mmHg at 30 C (pure compound) (58)
SOLUBILITY: Soluble in water to the extent of 105 ppm (0.01%
w/v) at 25 C (pure compound) (58).
III. HEALTH HAZARD INFORMATION
OSHA STANDARD: None established
NIOSH RECOMMENDED LIMIT: None established
ACGIH RECOMMENDED LIMIT: None established
A. ACUTE TOXICITY
DERMAL: LD50 = 4,000 mg/kg (rabbit) (62).
LD50 = >4,556 mg/kg (male albino rabbit, technical
product); >6,834 mg/kg <10,250 mg/kg (female albino
rabbit, emulsifiable concentrate - 4 lb/gal) (58).
Skin irritation - minimally irritating (0.2/8.0)
(albino rabbit, technical product); slightly
irritating (albino rabbit, emulsifiable concentrate
- 4 lb/gal) (58).
ORAL: LD50 = 2300 - 3700 mg/kg (rat) (62).
LD50 (technical product) = 2318 mg/kg (male albino
rat), 3720 mg/kg (female albino rat), 1653 mg/kg
(male albino mouse), 4118 mg/kg (female albino
LD50 (emulsifiable concentrate) = 5042 mg/kg (male
albino rat), 6,834 mg/kg (female albino rat) (58).
INHALATION: LC50 = >28 mg/m3 air for 6 hr. No adverse
effects noted during 5-day observation period
EYES: a. Technical product
Eye irritation tests - Albino rabbits
Washed eyes - practically nonirritating (1.5/110)
Unwashed eyes - minimally irritating (12.5/110)
b. Emulsifiable concentrate - 4 lb/gal
Eye irritation - Albino rabbits
Washed eyes - moderately irritating (32.5/110)
Unwashed eyes - Severely irritating (55/110)
B. SUBACUTE AND CHRONIC TOXICITY:
No significant toxic effect at 2,000 ppm in a 90-day feeding study
Long-term feeding studies indicate the no-effect level to be
>1,000 ppm (58).
IV. ENVIRONMENTAL CONSIDERATIONS
Behavior In Or On Soils
1. Absorption and leaching characteristics in basic soil types:
Absorbed by soil colloids.
2. Microbial breakdown: Microorganisms appear to play a significant
role in the soil degradation of diethatyl ethyl.
3. Loss form photodecomposition and/or volatilization: Low.
4. Resultant average persistence at recommended rates: Residual
herbicidal activity persists approximately 6 to 10 weeks (58).
Acute Oral LD50: Mallard duck - >10,000 mg/kg
Bobwhite quail - >10,000 mg/kg
Fish toxicity: Rainbow trout - TL50 96 hr. 1.82 ppm
Bluegill - TL50 96 hr. 3.34 ppm (58).
In 24-hr tests: bluegill had TL 7.14 mg/l, NEL 2.4 mg/l; rainbow
trout TL10.3 mg/l, NEL 1.0 mg/l. Nontoxic at 43.5 ug/bee
Toxic to fish. Do not use on muck soils (8b).
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 substitute for a more exhaustive
review of the literature nor for the judgement of a physician or other
If poisoning is suspected, do not wait for symptoms to develop.
Contact a physician, the nearest hospital, or the nearest Poison
SYMPTOMS OF POISONING: Unknown (58).
SKIN CONTACT: If product comes in contact with the skin,
immediately wash with soap and water (58).
INGESTION: Induce vomiting if swallowed (58).
EYE CONTACT: For eyes, immediately flush eyes with water for 15
minutes and get medical attention promptly (58).
VI. FIRE AND EXPLOSION INFORMATION
Combustible. Do not store near heat or open flame (58).
May be tank-mixed with other herbicides (8b).
VIII. PROTECTIVE MEASURES
STORAGE AND HANDLING: Technical product and formulations are stable
for >2 years under normal conditions (62). Avoid contact with skin and
eyes. Wash after handling (58). Protect Antor 4 ES from frost. Do
not contaminate water, food, or feed by storage or disposal. Open
dumping is prohibited (56).
IX. PROCEDURES FOR SPILLS AND LEAKS
IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
PESTICIDE TEAM SAFETY NETWORK/CHEMTREC
X. LITERATURE CITED
8b. Thomson, W.T. 1981. Agricultural chemicals - book 2:
herbicides. Revised ed. Thomson Publications, Fresno, CA.
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.
58. Weed Science Society of America, Herbicide Handbook Committee.
1983. Herbicide handbook of the weed science society of
America, 5th ed. Weed Science Society of America, Champaign,
IL. 515 pp.
62. The Pesticide Manual: A World Compendium, 7th ed. 1983. C.R.
Worthing, ed. The British Crop Protection Council, Croydon,
England. 695 pp.