See All Products2,4-D




For asparagus, cereals, corn, grasses, hay, rice, sorghum, soybeans (preplant), sugarcane, fallow land, pasture, rangeland, turf, and noncropland for control of annual mustard, Canada thistle, dandelion, lambsquarters, ragweed, etc. Many broadleaf crops (cotton, grapevines) are extremely sensitive.


Emulsion (esters), aqueous solution (salts), emulsifiable concentrate, wettable granule, wettable powder. The amine salts are: dimethylamine (DMA), diethanolamine (DEA), isopropylamine (IPA), triisopropanolamine (TIPA), etc. As with amines which form salts with the 2,4-D acid, esters are made with a wide variety of alcohols.


Common Names

2,4-D (ISO, BSI, WSSA); 2,4-PA (JMAF)

Exp. Code Number

CN 3808300 (Ciech S.A. Agro-Sulphur Group)

CAS Codes

94-75-7; 2702-72-9 (sodium); 94-11-1 (isopropyl ester)

Other Code Numbers

EINECS 202-361-1; SHA 030001



2,4-dichlorophenoxyacetic acid


Chlorinated phenoxy.


White powder. Melting point 140.5°C. Vapor pressure < 10-7 mbar. Acid not used customarily by itself; usually as an amine, salt, or ester. Only slightly soluble in petroleum distillate. Soluble in alcohols. Esters are soluble in oils.

Mode of Action / Resistance Management

Chemical Group


Mode of Action

action like indole acetic acid (synthetic auxins)

Action Group

HRAC Group O; WSSA Group 4

Environmental Guidelines


Fish: dimethylamine salt and acid LC50 >250 ppm; ester LC50 >5 ppm (bluegill, rainbow trout). Bird: LC50 5620 ppm (mallard duck, bobwhite quail)

Water Solubility

Slightly soluble. Amine salts are soluble in water; isopropyl ester is insoluble. Esters are essentially insoluble, but available formulations are usually emulsifiable

Safety Guidelines

Signal Word

Varies by formulation


(Rat): Oral LD50 699 mg/kg. Isopropyl: 700 mg/kg. Sodium Salt: 500-805 mg/kg. Dimethylamine salt: 949 mg/kg. Isooctyl ester: 896 mg/kg

Handling/Storage Caution

Do not contaminate water, food, or feed by product storage or disposal. Do not store near food, feed, fertilizers, seeds, insecticides, or fungicides. Do not use spray equipment contaminated with this product for any other purposes unless thoroughly cleaned with a suitable cleaner. The greatest danger to susceptible crops is spray drift and volatilization. Highly volatile esters may result in vapor damage to such crops, while low volatile esters such as butoxyethyl and isooctyl esters are less likely to cause damage, and salt formations are essentially non-volatile. Do not apply where irrigation water may be contaminated. Store in closed, original container in secure, dry, temperate area. Avoid contact with water.

Spill Control/Cleanup

Large spillages should be dammed-off and pumped into containers; soak up remainder with absorbent material; dispose of in accordance with local regulations

Product/Waste Disposal

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

Protective Clothing

Chemical-resistant apron when cleaning equipment, mixing, or loading. Long-sleeved shirt and long pants. Chemical-resistant gloves. Protective eyewear. Shoes plus socks.

Emergency Guidelines


Approx. 65°C (ester)

Fire Extenguishing Media

CO2, dry chemical, foam

First Aid

Get medical aid. Eyes: flush with plenty of water. Skin: flush with plenty of water; remove contaminated clothing and clean before reuse. Ingestion: do NOT induce vomiting unless advised by a physician