See All ProductsChlorothalonil




For use on beans, carrots, celery, cole crops, conifers, corn grown for seed, sweet corn, cranberries, cucumbers, dry edible beans, garlic, leeks, melons, mint, onions, papaya, passion fruit, peanuts, potatoes, pumpkins, shallots, soybeans, squash, stone fruits, tomatoes, ornamentals and grass grown for seed.


Suspension concentrate, water dispersible granule, wettable powder. Not compatible with oils.


Common Names

Chlorothalonil (ANSI, ISO, BSI); TPN (JMAF)

Exp. Code Number

ASC 66518 (ISK Biosciences Corporation)

CAS Code


Other Code Numbers

EINECS 217-588-1; SHA 081901



Tetrachloroisophthalonitrile (IUPAC)


Tech: White crystalline solid. Melting point 250°-251°C. Thermally stable under normal storage conditions. Stable to ultraviolet radiation; in neutral or acidic aqueous media. Odorless in pure form. Nonvolatile under normal field conditions. Vapor pressure, 5.72 x 10-7 torr at 25°C. Slightly soluble in xylene, acetone.

Mode of Action / Resistance Management

Chemical Group

chloronitriles (phthalonitriles)

Mode of Action

multi-site contact activity

Action Group

FRAC Code M5

Target Site

multi-site contact activity

Risk Note

Low risk

Environmental Guidelines


Fish: Toxic. LC50 49 µg/l (96 h) (rainbow trout); 62 µg/l (bluegill). Bee: Nontoxic

Water Solubility

Insoluble, 0.6-1.2 ppm

Safety Guidelines

Signal Words


Toxicity Classes



(Rat): Oral LD50 >10,000 mg/kg. Inhalation LC50 Actual airborne concentration: (1 h) 0.52 mg/l; (4 h) 0.1 mg/l. Nominal: (1 h) 7.9 mg/l; (4 h) 0.62 mg/l. (Rabbit): Dermal LD50 >10,000 mg/kg. Skin, eye irritant

Handling/Storage Caution

Keep in cool, dry, ventilated place. Avoid contact with skin and eyes

Spill Control/Cleanup

Solid spillage should be picked up with an industrial vacuum cleaner and disposed of in accordance with local regulations

Product/Waste Disposal

Dispose of by special means (suitable incineration, etc.) in accordance with local regulations

Protective Clothing

Long-sleeved shirt and long pants. Chemical-resistant gloves. Protective eyewear. Shoes plus socks.

Emergency Guidelines



Fire Extenguishing Media

CO2, foam, dry chemical or water

First Aid

Get medical aid. Eyes: immediately flush eyes with plenty of water for at least 15 minutes, holding eyelids apart to ensure flushing of entire eye surface. Skin: wash with plenty of soap and water. Remove contaminated clothes and footwear. Wash clothing and decontaminate footwear before reuse. Inhalation: remove person from contaminated area to fresh air or employ proper respiratory protection until adequate ventilation or other control measure is restored. Ingestion: if vomiting occurs, keep airway clear. Never give anything by mouth to an unconscious person.