Molecular Formula | C9H5Cl3N4 |
Molar Mass | 275.52 |
Density | 1.611 |
Melting Point | 159-160℃ |
Boling Point | 425.99°C (rough estimate) |
Water Solubility | 10mg/L(temperature not stated) |
Storage Condition | Avoid light, 2-8 ℃ |
Sensitive | Sensitive to light |
Refractive Index | 1.6000 (estimate) |
MDL | MFCD00041815 |
Physical and Chemical Properties | The chemical properties are white to yellow crystals. M. p.159 ~ 160 ℃ (crystallization from mixed solvent of benzene and cyclohexane). Soluble in chain hydrocarbons and most other organic solvents, solubility at 30 ℃: acetone 100g/L, chlorobenzene 60g/L, toluene 50g/L, xylene 40g/L; insoluble in water. It is stable in neutral and weakly acidic media, and easy to decompose when heated in alkaline media. |
Use | It is mainly used for the prevention and control of rice blast, flax leaf blight, anthracnose, downy mildew, scab, Vine blight and Botrytis cinerea of various crops. The use of concentration is generally 50% wettable powder 400-500 times liquid, spray, the use of each mu of 112-224g active ingredients. |
Risk Codes | R36/38 - Irritating to eyes and skin. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
Safety Description | S22 - Do not breathe dust. 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 | UN3077 9/PG 3 |
Raw Materials | Cyanuric chloride 2-Nitrochlorobenzene 2-Chloroaniline 2-Amino-4-methoxy-6-methyl-1,3,5-triazine |
storage conditions | 0-6°C |
acidity coefficient (pKa) | 0.43±0.10(Predicted) |
morphology | neat |
water solubility | 10mg/L(temperature not stated) |
Merck | 13,659 |
BRN | 223133 |
exposure limit | The German Research Society's recommended Maximum Allowable Concentration is 0.2 mg/m3. |
stability | Stable. Incompatible with oils and alkalies. May corrode some types of metal and alloy. |
EPA chemical information | Anilazine (101-05-3) |
heterocyclic systemic fungicides
diuron, also known as diuron, is a kind of heterocyclic systemic fungicide with a wide bactericidal spectrum. it is a low-toxic fungicide and the pure product is white crystal. Insoluble in water, soluble in most organic solvents. Chemical properties are stable. It is particularly effective for fungi such as Alternaria, Crocospora, Staples, Botrytis, etc. It is effective for rice blast, flax leaf spot, melon anthracnose, downy mildew, scab, tobacco scab, and tomato spot blight. The dosage forms include powder, wettable powder and granule. It is mainly used to control gray mold and other diseases of various crops such as vegetables and rice. Low toxicity to humans and animals. Rats take LD502710mg/kg orally, which has irritating effect on skin. The Japanese pesticide registration retention standard stipulates that the maximum allowable concentration of fruits (except strawberries), vegetables, beets, etc. is 10 mg/kg, and strawberries are 20 mg/kg.
how to use
Mainly used for foliar spray. 50% diuron wettable powder is composed of active ingredients, fillers and surfactants. Its appearance is yellowish brown powder, suspension rate ≥ 34%, moisture content ≤ 3%,pH6 ~ 9, stored at room temperature for 2 years, and the content of active ingredients does not change much.
(1) control cucumber downy mildew. Use 50% diuron wettable powder 400~500 times liquid, spray at the initial stage of the disease, spray 600~1200kg/hm2 liquid medicine, generally spray 3~4 times, the interval is 7 days.
(2) control of rice blast. With 50 diuron wettable powder 500 times solution, spray once at the initial stage of leaf blast and once at the break stage of rice, spray 750~900kg/hm2 of liquid medicine (containing 750~900g of active ingredient).
(3) prevention and treatment of tobacco scab. 50% 400 times the wettable powder of diuron. Spray 600~900kg/ hm2 liquid medicine (effective ingredient 750~1050g) at the initial stage of onset.
(4) control tomato spot blight. 50% 4500 times the wettable powder of diuron, spray at the initial stage of the disease, spray 600~900kg/hm2 of liquid medicine (active ingredient 600~900g).
precautions
(1) Do not mix with alkaline agents.
(2) medication should be stopped at the flowering stage of rice to prevent phytotoxicity.
(3)50% diuron wettable powder is a low-toxic fungicide, but dispensing and application personnel still need to pay attention to safety to prevent the liquid medicine from inhaling or contaminating the skin, and rinse in time after spraying.
(4)50% diuron wettable powder can cause poisoning through the esophagus and respiratory tract, and long-term contact with the skin also has a stimulating effect, but there is no special antidote, and symptomatic treatment is required.
(5) after application, all kinds of tools should be carefully cleaned, sewage and remaining liquid medicine should be properly disposed of and stored, and should not be dumped arbitrarily, so as not to pollute the soil of fish ponds and water sources.
(6) when handling, care should be taken with care to avoid damage and pollution of the environment. There shall be special wans and warehouses for transportation and storage, and shall not be transported together with food and daily necessities.
(7)50% diuron wettable powder should be stored in a dry and well-ventilated warehouse.
Toxicity
acute oral LD502710mg/kg(5000 mg/kg) in rats and 9460 mg/kg in rabbits. Long-term contact has a irritating effect on the skin. No carcinogenic effect was found in animal tests. Low toxicity to birds, safe for bees and high toxicity to fish.
use
1, broad-spectrum, systemic fungicide. Mainly used for foliar spraying, it has special effects on fungi such as Alternaria, Crocospora, Staphyllum, Botrytis and so on. It can control rice blast, flax leaf spot, melon anthracnose, downy mildew, scab, tobacco scab, tomato spot blight and gray mold of various crops. The use concentration is generally 400~500 times of 50% wettable powder spray, and the recommended use amount is 16.8~33.6g active ingredient/100 m2.
2. It is mainly used to control rice blast, anthracnose, downy mildew, scab and gray mold of various crops.
production method
1. In the presence of acid binding agent, cyanuric chloride reacts with o-aniline at 85 ℃ to obtain divend. Raw material consumption quota: cyanuric chloride 550kg/t, o-chloroaniline 460kg/t.
2, o-nitrochlorobenzene is reduced to produce o-chloroaniline, and the preparation method of cyanuric chloride is shown in triazine herbicides. In the presence of acid binding agent, o-chloroaniline and cyanuric chloride react at 85 ℃ to prepare divendazim.
category
Pesticides
toxicity classification
Poisoning
acute toxicity
oral-rat LD50: 2700 mg/kg; oral-mouse LD50: 6020 mg/kg
stimulus data
skin-rabbit 500 mg severe
flammability hazard characteristics
Combustion produces toxic nitrogen oxides and chloride gases
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored and transported separately from food raw materials
fire extinguishing agent
Dry powder, foam, sand
WGK Germany | 3 |
RTECS number | XY7175000 |
toxic substance data | 101-05-3(Hazardous Substances Data) |
Toxicity | LD50 orally in rats: >5000 mg/kg, Mobay Technical Information Sheet, Jan. 1979 |