2,4,5-T, isobutyl ester

  • Acetic acid, (2,4,5-trichlorophenoxy)-isobutyl ester
  • Acetic acid, (2,4,5-trichlorophenoxy)-2-methylpropyl ester
  • Isobutyl 2,4,5-T
  • 2,4,5-Trichlorophenoxyacetic acid isobutyl ester
  • Isobutyl 2,4,5-trichlorophenoxyacetate
Formula
C12H13Cl3O3
Structure
Description
Off-white solid.
Uses
2,4,5-T salts & esters are used widely to control woody plants on industrial sites & rangeland 2,4,5-t salts and esters, former use.

Registry Numbers and Inventories.
CAS
4938-72-1
EC (EINECS/ELINCS)
225-580-4
UN (DOT)
2765
Beilstein/Gmelin
3377415
Beilstein Reference
4-06-00-00975
RCRA
F027
EPA OPP
82062
Austrailia AICS
Listed

Properties.
Formula
C12H13Cl3O3
Formula mass
311.59
Melting point, °C
32
Boiling point, °C
336
Critical temperature
528
Critical pressure
20.6
Solubility in water
Insoluble
Partition coefficient, pKow
4.87

Hazards and Protection.
Storage
Keep containers of 2,4,5-T and derivatives tightly closed at ambient temperature in a well-ventilated area away from food and feed products, heat, and water. Do not store near other agrochemicals or seeds.
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
Wear appropriate chemical protective boots and goggles. Rubber gloves.
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
Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, 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
No data.
Incompatibilities
May react exothermically with acids to generate isobutyl alcohol and 2,4,5-trichlorophenoxyacetic Strong oxidizing acids may cause a reaction that is sufficiently exothermic to ignite the reaction products.

Fire.
Fire fighting
Fires involving this material can 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
Hydrogen chloride gas and other irritating fumes may form during fires.

Health.
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.
   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