Action / Use
ACTION: Herbicide.
USE: 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. Aqua-Kleen* for control of aquatic weeds in lakes and ponds. Citrus Fix* in lemon packinghouses; prevents preharvest drop of mature citrus.
FORMULATIONS: Emulsion (esters), aqueous solution (salts), emulsifiable concentrate, 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.
PREMIX PARTNERS: Ametryn; Anilofos; Atrazine; Bentazone; Bromoxynil; Butachlor; Carfentrazone-ethyl; Cinidon-ethyl; Clopyralid; Cyanazine; Dicamba; Dichlorprop; Dichlorprop-P; Diuron; Fenoxaprop-P-ethyl; Fluroxypyr; Glyphosate; Ioxynil; MCPA; Mecoprop; Mecoprop-P; Metsulfuron-methyl; MSMA; Picloram; Piperophos; Prometon; Propanil; Pyraflufen-ethyl; Quinclorac; Sulfentrazone; Thiencarbazone-methyl; Triclopyr.

COMMON NAME: 2,4-D (ISO, BSI, WSSA); 2,4-PA (JMAF).

COMPOSITION: 2,4-dichlorophenoxyacetic acid.
CLASS: Chlorinated phenoxy.
PROPERTIES: White powder. Melting point 140.5℃. 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. Aqua-Kleen*: Gray to tan granules with mild phenolic odor.

CHEMICAL GROUP: Phenoxy-carboxylic-acid
MODE OF ACTION: Action like indole acetic acid (synthetic auxins)
ACTION GROUP: HRAC Group O; WSSA Group 4

HAZARDS: 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.

TOXICITY: (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 CAUTIONS: 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. Citrus Fix* may crystallize if stored at cold temperatures; if this occurs, call Amvac Chemical Corp. before using. 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.

FLASHPOINT: Approx. 65℃ (ester).
FIRE EXTINGUISHING MEDIA: Citrus Fix*: 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.