| Molecular Formula | C14H9Cl5 |
| Molar Mass | 354.486 |
| Density | 1.451g/cm3 |
| Melting Point | 107-110℃ |
| Boling Point | 416.2°C at 760 mmHg |
| Flash Point | 203.9°C |
| Water Solubility | Slightly soluble. 0.00000017 g/100 mL |
| Vapor Presure | 9.42E-07mmHg at 25°C |
| Refractive Index | 1.608 |
| Physical and Chemical Properties | Colorless solid with a weak, chemical odor. |
| Use | With stomach poison and contact killing effect, is a high residue pesticide varieties, used to control a variety of insects and health pests |
| Risk Codes | R25 - Toxic if swallowed R40 - Limited evidence of a carcinogenic effect R48/25 - R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R36/37/38 - Irritating to eyes, respiratory system and skin. R11 - Highly Flammable R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R24 - Toxic in contact with skin R67 - Vapors may cause drowsiness and dizziness R65 - Harmful: May cause lung damage if swallowed R38 - Irritating to the skin |
| Safety Description | S22 - Do not breathe dust. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 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. S36 - Wear suitable protective clothing. S33 - Take precautionary measures against static discharges. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S16 - Keep away from sources of ignition. S7 - Keep container tightly closed. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
| UN IDs | UN 2811 6.1/PG 3 |
chemical properties
colorless needle crystal. Melting point 108.5-109 ℃, boiling point 260 ℃. Easily soluble in pyridine and dioxane. The solubility in 100ml solvent is: acetone 58g, carbon tetrachloride 45g, chlorobenzene 74g, ethanol 2g, ether 28g. Insoluble in water, dilute acid and lye.
use
DDT was once one of the widely used insecticides. It has stomach toxicity and contact effects and can be processed into powder, emulsion or oil for use. In the past, China was mainly used to control cotton bud-boll pests, fruit tree heart worms, farmland crop stick insects, vegetable cabbage worms, etc. It is also used for environmental sanitation, preventing mosquitoes, flies, bedbugs, etc. DDT is not easy to be degraded into non-toxic substances, which is easy to accumulate and pollute the environment during use. DDT remaining in plants can enter human and animal bodies through the "food chain" or other ways, causing poisoning and affecting human health. It is currently prohibited to use DDT. However, some industrial uses of DDT, including pesticides that use it as raw materials, also require DDT as an intermediate, such as dicofol.
It has stomach poison and contact effect, and is a high residue pesticide variety, used to control a variety of insects and sanitary pests
production method
It is obtained by condensation of chloroacetaldehyde and benzene monochloride in the presence of fuming sulfuric acid. Put trichloroacetaldehyde and chlorobenzene into the condensation pot, stir and add fuming sulfuric acid dropwise. The condensed materials are left to stand and layered, and the waste acid is released. The acidic DDT chlorobenzene solution is washed with hot water, and then washed with sodium hydroxide solution. Then the chlorobenzene is recovered by distillation, and the residue, the molten DDT, is put into a roller crystallizer to cool and crystallize to obtain the finished product. The condensation reaction is carried out at 10-23 ℃, and the waste acid produced by the condensation reaction (including p-chlorobenzenesulfonic acid generated by the side reaction) or the side reaction is added at the same time as the condensation reaction, and the production of p-chlorobenzenesulfonic acid is reduced. The time for adding sulfuric acid is about 2.5h. The para content of DDT raw powder of first-class products is ≥ 74.0%.
category
Pesticides
toxicity classification
High toxicity
acute toxicity
oral-rat LD50: 87 mg/kg; oral-mouse LD50: 135 mg/kg
flammability hazard characteristics
Decomposition of toxic chloride gas by heat
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored and transported separately from food raw materials
fire extinguishing agent
Sand, dry powder, foam
occupational standards
TWA 1 mg/m3; STEL 3 mg/m3