2,4-D butyl ester

  • Butyl dichlorophenoxyacetate
  • Butyl (2,4-dichlorophenoxy)acetate
  • 2,4-Dichlorophenoxyacetic acid butyl ester
  • Esso Herbicide 10
  • Fernesta
  • Lironox
Formula
C12H14Cl2O3
Structure
Description
Clear colorless to light brown liquid.
Uses
Herbicide for pasture & rangelands, agricultural use-eg, wheat, corn, grain sorghum, rice and other grains, industrialcommercial uses, lawns, turf, & aquatic use, other field crops-eg, nuts, component of herbicide for jungle defoliation-former use 2,4-d and derivatives.

Registry Numbers and Inventories.
CAS
94-80-4
EC (EINECS/ELINCS)
202-364-8
RTECS
AG8050000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Reproductive Effector
UN (DOT)
2765
Beilstein/Gmelin
2056085
Beilstein Reference
3-06-00-00706
RCRA
U240
EPA OPP
30056
Swiss Giftliste 1
G-6518
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C12H14Cl2O3
Formula mass
277.16
Melting point, °C
9
Boiling point, °C
344
Vapor pressure, mmHg
0.0001 (25 C)
Vapor density (air=1)
7E-5 (25 C)
Solubility in water
Insoluble
Partition coefficient, pKow
4.26
Heat of vaporization
58.8 kJ/mol

Hazards and Protection.
Storage
Store at ambient temperatures with open venting.
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
See information for this field in accession number 8400333 (2,4-d esters).
Respirators
Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.
Small spills/leaks
If you spill this chemical, FIRST REMOVE ALL SOURCES OF IGNITION. Then, use absorbent paper to pick up all liquid spill material. Your contaminated clothing and absorbent paper should be sealed in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
Shelf life of ester formulations varies, depending on the emulsifying system. Some retain satisfactory emulsifying properties after 3 yr.
Incompatibilities
Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products.

Fire.
Flash Point,°C
132
Fire fighting
Fires involving this material should be controlled using a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This material is probably combustible.
Hazards
Containers may explode when heated.
Combustion products
Irritating hydrogen chloride may form in fire.

Health.
Exposure limit(s)
OSHA: PEL (8 h TWA): 10 mg/m3.
Poison_Class
3
Exposure effects
Low dose exposures - vertigo, headache, malaise, and paresthesias may occur depending on the specific compound involved. High dose exposures - muscle twitching, spasms, profound weakness, polyneuritis, and unconsciousness may occur depending on the specific compound involved. Idiosyncratic reactions - peripheral neuropathies 2,4-D and 2,4,5-T have caused adverse reproductive effects in experimental animals. Allegations of human birth defects due to these compounds have not been confirmed.
   Ingestion
Nausea, vomiting, and diarrhea have been reported. Necrosis of the gastrointestinal mucosa has been reported.
   Inhalation
Ingestion of large amounts may cause bradypnea, respiratory failure, hyperventilation, or pulmonary edema.
   Skin
Direct contact may cause skin irritation. Chlorodioxin contamination of products may produce chloracne with heavy exposure.
   Eyes
See Skin.

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
2765
Response guide
Hazard class
3.2