bromoxynil (Brominal, Buctril) Herbicide Profile 2/85
CHEMICAL NAME: 3,5-Dibromo-4-hydroxybenzonitrile (56)
TRADE NAME(S): Bronate, Buctril, Brominal (56)
FORMULATION(S): Brominal and Buctril are formulations of the
octanoic acid ester of bromoxynil containing 2
pounds bromoxynil equivalent per gallon. ME4
Brominal is a formulation of the octanoic and
butyric acid esters of bromoxynil containing
4 pounds bromoxynil equivalent/gallon (56).
BASIC PRODUCER(S): Rhone-Poulenc, Inc.
P.O. Box 125
Monmouth Junction, NJ 08852
Union Carbide Agr. Products Co., Inc.
P.O. Box 17610
7825 Baymeadows Way
Jacksonville, FL 32216
STATUS: Restricted use as of 5/89
[See separate item (Number 2) under the
bromoxynil profile selection]
PRINCIPAL USES: Registered for use in wheat, barley, oats, rye, flax,
garlic, onions, sweet and field corn (triticale), annual canarygrass,
grass for sod seed production, seedling turf, established turf, and
noncrop areas (industrial sites, vacant lots, roadsides, etc.) for
postemergent control of common cocklebur, common ragweed, seedling
broadleaf weeds such as blue (purple) mustard, corn gromwell,
cowcockle, fiddleneck, field pennycress, green smartweed, groundsel,
jimsonweed, lambsquarters, London rocket, nightshade, shepherdspurse,
tartary buckwheat, tarweed, tumble mustard, wild buckwheat,
velvetleaf, volunteer sunflower, and wild mustard (56).
Susceptible Weeds When Treated at the Proper Stage:
Annual sowthistle Kochia Shepherdspurse
Black mustard Lambsquarters Silver leaf night-
Blue (purple) mustard London rocket shade
Bristley star bur Mare's-tail Smallseeded false
Bullthistle Miners lettuce flax
Bur buttercup Morningglory (annual) Southern giant curl
Cocklebur Nettleleaf goosefoot mustard
Corn chamomile Nightshade Sunflower
Corn gromwell Nodding thistle Tansy mustard
Cow cockle Parthenium ragweed Tartary buckwheat
Dog fennel (Mayweed) Pennsylvania Tarweed
Dyers wood smartweed Treacle mustard
Fiddleneck Pepperweed Tumble (Jim Hill)
Field pennycress, Pigweed mustard
fanweed Popcorn flower Velvetleaf
Fivehooked bassia Prickly (Chinese) Wild buckwheat
Fumitory lettuce Wild mustard
Green smartweed Puncture vine Wild radish
Groundsel Ragweed Winter vetch
Henbit Red maids rock Yellow rocket
Jimsonweed purslane Yellow star thistle
Knawel (German moss) Russian thistle
II. PHYSICAL PROPERTIES
MOLECULAR FORMULA: C7 H3 Br2 NO (62)
MOLECULAR WEIGHT: 276.9 (62)
PHYSICAL STATE: Colorless solid (pure compound), the technical
grade is c. 95% pure (62).
ODOR: Odorless when pure (54)
MELTING POINT: 194-195 C (pure compound); 188-192 C
(technical grade) (62).
SOLUBILITY: 130 mg/l water at 25 C (pure compound) (62)
III. HEALTH HAZARD INFORMATION
OSHA STANDARD: NA
NIOSH RECOMMENDED LIMIT: NA
ACGIH RECOMMENDED LIMIT: NA
A. ACUTE TOXICITY
DERMAL: LD50 = for rats >2000 mg a.i./kg, >2000 mg octanoate
/kg; for rabbits, 3660 mg a.i./kg, 1675 mg tech.
Mild irritation on abraded skin of rabbits;
no effect with a 10% solution of the
formulation on rabbit skin for 3 days (54).
ORAL: LD50 = for rats 190 mg a.i./kg, 130 mg formulated
salt/kg, 365 mg formulated octanoate/kg; for
mice 110 mg a.i./kg, 100 mg formulated salt/kg,
306 mg formulated octanoate/kg (62).
INHALATION: 10% solution inhaled 6 hr a day for 5 days
produced no significant effect (rabbit) (54).
EYES: Mild and temporary conjunctival reaction,
irrigation of the eye reduced the severity of
the response (rabbit) (54).
B. SUBACUTE AND CHRONIC TOXICITY:
Rats fed 1000 ppm over a 3-month period had no significant
In 90-day feeding trials NEL was: for rats 16.6 mg bromoxynil-
potassium/kg daily, 15.6 mg bromoxynil-octanoate/kg daily; for dogs
5 mg bromoxynil octanoate/kg daily (62).
C. EPA TOLERANCE SUPPORT DATA:
A subchronic (13-week) dog feeding study established a
no-observable-effect-level (NOEL) of 5 mg/kg/day (200 ppm/day); a
subchronic (13-week) rat feeding study established a NOEL of 312
IV. ENVIRONMENTAL CONSIDERATIONS
Residues of Bromoxynil were not detected in milk or feces of
lactating cows (52).
This product (Brominal) is toxic to fish. Do not apply directly
to water. Do not apply when weather conditions favor drift from
treated areas. Do not contaminate water used for irrigation or
domestic purposes by cleaning of equipment or disposal of waste (32b).
Pheasant chicks - 8 day LC50 4400 ppm
Quail - LD50 100-125 mg/kg
Mallard duck - LD50 200 mg/kg
Fish Species LC50
Daphnia 0.011 ppm
Rainbow Trout 0.050 ppm
Goldfish 0.170 ppm
Catfish 0.023 ppm (54)
LC50 (48hr) is: for harlequin fish 5.0 mg bromoxynil-
potassium/l; for rainbow trout 0.15 mg bromoxynil octanoate/l; for
goldfish 0.46 mg/l; for catfish 0.063 mg/l. Sprays of 2.2 g
bromoxynil-potassium/l or 3.4 g bromoxynil octanoate/l showed no
contact toxicity to honeybees (62).
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
SKIN CONTACT: Wash immediately with soap and water and remove
contaminated clothing (Brominal X) (32b).
INGESTION: Induce vomiting (56).
Drink promptly large quantities of milk, egg white, gelatin solution
or if these are not available, drink large quantities of water. Avoid
alcohol. Get medical attention (Brominal) (32b).
EYE CONTACT: Rinse thoroughly with water and get medical
attention (Brominal) (32b).
VI. FIRE AND EXPLOSION INFORMATION
Ester formulation flash above 82 C (54).
Salts are suitable for use in hard water to 600 ppm hardness.
Should not be mixed with other pesticides without first making a
compatibility test. Ester formulations are not affected by hard water.
Noncorrosive to spray equipment (54).
VIII. PROTECTIVE MEASURES
STORAGE AND HANDLING: Handle carefully. Avoid contact with fish and
wildlife. Do not use or store near heat or open flame. Store at
temperatures above 3 F. If allowed to freeze, remix before using. Do
not contaminate water, food, or feed by storage or disposal of this
PROTECTIVE CLOTHING: Wear rubber gloves when handling concentrate (56).
IX. PROCEDURES FOR SPILLS AND LEAKS
IN CASE OF EMERGENCY, CALL, DAY OR NIGHT
PESTICIDE TEAM SAFETY NETWORK/CHEMTREC
X. LITERATURE CITED
32b. Union Carbide Agricultural Products Company, Inc. Product
bulletin: Brominal broadleaf herbicide. Research
Triangle Park, NC.
53a. U.S. Government Printing Office. 1982. Federal Register.
47(3):651-652. Superintendant of Documents. Washington,
54. Weed Science Society of America, Herbicide Handbook Committee.
1979. Herbicide handbook of the weed science society
of America, 4th ed. Weed Science Society of America,
Champaign, IL. 479 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.