Chlorothalonil

  • 2,4,5,6-Tetrachloro-1,3-benzenedicarbonitrile
  • 2,4,5,6-Tetrachloro-3-cyanobenzonitrile
  • Tetrachloroisophthalonitrile
Formula
C8Cl4N2
Structure
Description
Colorless crystals or granules or light gray powder. No odor when pure; technical grade has a slightly pungent odor.
Uses
Fungicide on a variety of vegetable crops, peanuts, lawns & turfs.

Registry Numbers and Inventories.
CAS
1897-45-6
EC (EINECS/ELINCS)
217-588-1
EC Index Number
608-014-00-4
EC Class
Carcinogenic Category 3; Dangerous for the Environment
RTECS
NT2600000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen
UN (DOT)
2588
Merck
12,2219
Beilstein/Gmelin
1978326
EPA OPP
81901
Swiss Giftliste 1
G-3329
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8Cl4N2
Formula mass
265.91
Melting point, °C
250-251
Boiling point, °C
350
Vapor pressure, mmHg
5E-5 (25 C)
Vapor density (air=1)
1.7
Density
1.7 g/cm3 (20 C)
Solubility in water
100 mg/L
Partition coefficient, pKow
2.53
Heat of vaporization
59.5 kJ/mol

Hazards and Protection.
Storage
Keep in cool, dry, ventilated place. Do not store alongside food and feedstuffs.
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
Use gloves, apron, rubber or plastic boots; use mask for powders.
Respirators
Wear a NIOSH-approved half face respirator equipped with a combination filter cartridge, i.e. organic vapor/acid gas/HEPA (specific for organic vapors, HCl, acid gas, SO2 and a high efficiency particulate filter).
Small spills/leaks
If a spill of this chemical occurs, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with acetone and transfer the dampened material to a suitable container. Use absorbent paper dampened with acetone to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with acetone 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
Thermally stable under normal storage conditions, is stable to alkaline and acid aqueous solutions and to UV light. Technical chlorothalonil.
Incompatibilities
May react violently with strong oxidizing acids Incompatible with other oxidizing agents such as peroxides and epoxides.
Decomposition
May decompose at high temp to emit hydrogen chloride.

Fire.
Flash Point,°C
154
Fire fighting
Fires involving this compound should be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
Non-Combustible
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Carcinogin
I-2B, CP65
Poison_Class
3
Exposure effects
   Ingestion
Spontaneous emesis may occur.
   Inhalation
Burning sensation. Irritates the respiratory tract.
   Skin
Irritant contact dermatitis can occur with exposure to concentrations of greater than 0.01%. Photosensitive and allergic reactions are also possible.
   Eyes
Redness, pain, blurred vision.

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. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. 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
2588
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
CTN