Molecular Formula | C12H14Cl2O3 |
Molar Mass | 277.14 |
Density | 1.2639 (rough estimate) |
Melting Point | 9°C |
Boling Point | 146-147°C |
Flash Point | 125.7°C |
Solubility | Chloroform (Slightly), Methanol (Slightly) |
Vapor Presure | 0.000146mmHg at 25°C |
Appearance | neat |
Color | Colourless |
BRN | 2056085 |
Storage Condition | 0-6°C |
Stability | Stable. Incompatible with strong oxidizing agents. |
Refractive Index | 1.5209 (estimate) |
Physical and Chemical Properties | Pure product is colorless oily liquid, boiling point 169 ℃/266.4, relative density (d420 )1.2428. The crude oil is brown liquid, the relative density is 1.21 at 20 ℃, the boiling point is 146-147 ℃/133.3, the melting point is 9 ℃, and the vapor pressure is 133.3 at 25-28 ℃. Difficult to dissolve in water, soluble in a variety of organic solvents, volatile, strong alkali decomposition. |
Use | Systemic selective herbicide, mainly used for controlling dicotyledonous weeds, cyperus, and some malignant weeds in gramineous crop fields. Cotton, soybean and other crops are sensitive to the agent, and a certain isolation area should be maintained when using it. |
Risk Codes | R22 - Harmful if swallowed R43 - May cause sensitization by skin contact R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S29 - Do not empty into drains. S36/37 - Wear suitable protective clothing and gloves. S46 - If swallowed, seek medical advice immediately and show this container or label. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 3082 |
WGK Germany | 3 |
RTECS | AG8050000 |
Hazard Class | 6.1(b) |
Packing Group | III |
Toxicity | LD50 oral in rat: 600mg/kg |
NIST chemical information | information provided by: webbook.nist.gov (external link) |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
herbicide | 2,4-drop butyl ester is a kind of sulfonylurea hormone type selective herbicide, insoluble in water, soluble in a variety of organic solvents, volatile, alkali decomposition. It has strong internal absorption conductivity, and has excellent control effect on a variety of broad-leaved weeds in wheat fields, such as sowing mother Wormwood, water spinach, etc., with high efficacy, at very low concentrations (<0.01%). That can inhibit the normal growth and development of plants, deformity, until death. It is mainly used for stem and leaf treatment after seedling, with good spreading, strong permeability, easy to enter the plant body, not easy to be washed by rain, sensitive to dicotyledonous weeds, and safe for cereal crops. 2,4-drop butyl ester is mainly used in wheat, barley, barley, corn, sorghum and other gramineous crop fields and Gramineae grassland, to control the sowing of Artemisia, Chenopodium, Polygonum mustard, ionic grass, plumes, Portulaca oleracea, Euglena rubra, yew, Yew Picea, atrifolium asiatica, atrifolium asiatica, totifolium indicum L., Suaeda, Polygonum Asaeda, Polygonum cuspidatum, Polygonum cuspidatum, the broad-leaved weeds, such as Polygonum cuspidatum, trichosanthis, Sophora alopecuroides, camel stings, mi-WA cans, yezoensis, Mosla, hydrospiny, Xanthium sibiricum, and Portulaca oleracea have no effect on the grass weeds. |
toxicity | According to China's pesticide toxicity grading standards for low toxicity herbicides, rats with acute oral LD50 500-150 mg/kg, no chronic toxicity problem. To carp TLM(48 h) 40 mg/kg. It is also a kind of herbicide with low toxicity to fish. If the eyes are exposed to the drug, rinse with plenty of water; If the skin is touched, wash with soap; If the drug is taken by mistake, do not use the drug to induce vomiting, drink a lot of water to induce vomiting, all victims should immediately seek medical treatment. No drug should be administered. |
method of use | the volume of liquid spray is 300-600 L/ha, tractor sprayer is 150-200 L, choose morning and evening low temperature, wind hours. human ammonium sulfate, urea and compound liquid fertilizer can be added when spraying, synergist AA-921 and YZ-901 are added. With 225 per hectare can reduce the drift volatilization. Stable efficacy can be obtained under drought conditions. Dosage Form: 72% 2, 4-D butyl emulsion 1. Winter wheat, barley field use: the application period for the end of the tiller, broad-leaved grass 3-5 leaf stage, with 50-100 ml per mu, 30-40kg of water dilution spray. 2. Use of spring wheat and barley in highland barley field: the application period is from 4-5 leaves to full tiller stage, with the same dosage as winter wheat. 3. Field application of corn and sorghum: 3-5 days after sowing, 50-100 ml per mu before emergence, and 35kg of water were sprayed evenly on the soil surface and the existing weeds. Can also be in corn, sorghum seedling after 4-5 leaf stage, each mu with 40-65 ml, about 35kg of water, the weed leaf spray. 4. Use in millet field: in the applicable period, the seedling is in the period of 4-6 leaves, with 30-50 ml per mu, 15-20kg of water, and the weed stems and leaves are sprayed. 5. Paddy field use: the pot use period is the end of the rice tillering stage, with 35-50 ml per mu, and the water 30kg spray use. The water layer was drained in the evening before spraying. Water was added every other day after spraying. 6. Sugarcane field use: the suitable period is before the germination and emergence of sugarcane, 150-200 ml per mu, 30kg of water spray. 7. Pasture use: 150-200 ml per mu, spray on 25-50kg of water. |
harmfulness | 2,4-D butyl ester has strong growth inhibition, which is destructive to sensitive economic crops. Immediately after corn sowing, the drug was sprayed on the ground, and the weeds were not grown in the growing period of corn, but the corn straw livestock who used the drug were not willing to eat, and the effect was more than one year, during this period, all other plants did not grow long, and actually had a certain inhibitory effect on corn. There was no high yield of corn without applying 2,4-drop butyl ester, which showed great toxicity. Its spraying period is the rapid growth period of the leaves of grapes and other plants (around May 1), the drift of the medicine mist during spraying and the evaporation of the water on the ground when the sun comes out every time after the rain, the toxic gases drift to the distant places with the wind, and the victims are serious in the places where the medicine mist and the toxic gas pass by, within 1000 of each other, the closer the more serious, 2000 have symptoms, in the rain or fog a day, down the wind in the 3km away can harm grapes, schisandra, cotton, soybean, rape, sunflower, melon and other sensitive dicotyledonous crops. The young leaves fumigated with the medicinal mist immediately stopped growing or grew slowly and gradually exhibited some dry and necrotic necrosis of Virus of the leaves, which seriously affected the photosynthesis of the leaves. The flowering period could not provide nutrition for fruit setting, causing the fruits to fall off in large amounts or to be frozen, A large number of damaged leaves fall off in July -8 months, which can not provide nutrition for fruit growth, branch tissue maturation and flower bud differentiation in the late stage of plants, and directly affect the growth and fruiting of grape dicotyledons sensitive economic crops. |
note | 1. Medication should not be taken too early or too late; The dosage should not be increased at will; The temperature should not be lower than 10 ℃, otherwise it is easy to cause drug damage. 2. It is very sensitive to cotton, soybean, rape, vegetables, trees, sunflower, melon, fruit trees and other dicotyledonous crops. Spray must be selected in windless or gentle weather, avoid high temperature application, do not spray or drift into sensitive crops, so as to avoid the occurrence of damage, interplanting cotton, sunflower, 2,4-drop butyl ester cannot be used in fields of sensitive crops such as vegetables. 3. Strictly control the application period and dosage, wheat and rice are sensitive to 2,4-drop butyl ester before and after the 4-leaf stage, which is not suitable for use. 4. Dispensing, dispensing containers and spray equipment must be dedicated. 5. Can not contact with the acid-base, so as to avoid decomposition failure. |
Application | 2,4-D butyl ester is an excellent hormone herbicide, and its herbicidal performance is much better than that of 2,4-D, the dosage is also small, is one of the main varieties of herbicides. It has good spreading and internal absorption, is not easy to be washed by water, and has long-lasting efficacy and low toxicity to humans and animals. As a selective herbicide, the product is mainly used to control the dicotyledonous weeds in the field of gramineous crops, some malignant weeds of the opposite Cyperaceae, paddy fields, wheat fields, corn, millet, sorghum, sugarcane, flax and woody plants can also be used, and have good control effect on annual and perennial weeds. is a highly selective and has the role of the absorption of the herbicide is a selective herbicide, mainly to control broad-leaved weeds in the grass crop field, Some malignant weeds used for chemical synthesis; Ethyl acetate, chloroacetic acid systemic selective herbicide, mainly used for controlling dicotyledonous weeds, Cyperus, and some malignant weeds. Cotton, soybean and other crops are sensitive to the agent, and a certain isolation area should be maintained when using it. |
production method | Firstly, 2, 4-dichlorophenol is produced by chlorination of phenol, after being neutralized by alkali solution, it is subjected to condensation reaction with sodium chloroacetate to form 2,4-D sodium salt, which is obtained by esterification reaction with butanol after acidification. Raw material consumption quota: phenol 480kg/t, chloroacetic acid 510kg/t, butanol 320kg/t, liquid chlorine 720kg/t, hydrochloric acid (30%)520kg/t, liquid alkali (fold 100%)630kg/t. |
category | pesticide |
toxicity grade | high toxicity |
Acute toxicity | oral-rat LD50: 600 mg/kg; Oral-mouse LD50: 380 mg/kg |
flammability hazard characteristics | toxic chloride gases from combustion |
storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
extinguishing agent | dry powder, foam, carbon dioxide, water |
Occupational Standard | TWA 10 mg/m3; Tel 20 mg/m3 |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |