3,4-DCNB

National Standard No.: 61679-4
CAS:    61679-4
Chinese Name: 3,4-DICHLORONITROBENZENE
English Name: 3,4-DICHLORONITROBENZENE
Alias: 1,2-dichloro-4-nitrobenzene
Molecular formula: c6h3cl2no2; Cl2C6H3NO
Molecular weight: 192.00
Melting point: 43 ℃, boiling point: 255 ~ 256
Density: relative density (water = 1) 1.46
Steam pressure: 123 ℃
Solubility: insoluble in water, soluble in ethanol and ether
Stability: stable
Appearance and properties: acicular crystal
Danger sign: colSpan = "3" 15 (harmful goods, keep away from food)
Use: as an intermediate
2. Impact on the environment:
1、 Health hazards
Invasion route: inhalation, ingestion and percutaneous absorption.  
Health hazard: irritating to skin, mucous membrane and respiratory tract. Absorption leads to the formation of methemoglobin in the body, and sufficient methemoglobin causes cyanosis.  
2、 Toxicological data and environmental behavior
Acute toxicity: ld50643mg / kg (oral to rats)
Hazard characteristics: flammable in case of open fire and high heat. It can react with strong oxidant. By high thermal decomposition, toxic nitrogen oxides and chloride gases are produced. Corrosive.  
Combustion (decomposition) products: carbon monoxide, carbon dioxide, nitrogen oxide and hydrogen chloride.  
3. On site emergency monitoring method:
4. Laboratory monitoring method:
Liquid chromatography
5. Environmental standards:
The maximum allowable concentration of harmful substances in the air of workshops in China (tj36-79) is 1mg / m3 [skin]
6. Emergency handling methods:
1、 Leakage emergency treatment
Isolate the leakage pollution area, set warning signs around it, and suggest that emergency treatment personnel wear gas masks and chemical protective clothing. Properly ventilate and do not directly contact the leakage. Collect it in a dry and clean container with a clean shovel and transport it to the waste treatment site. If there is a large amount of leakage, it shall be recycled or discarded after harmless treatment.  
2、 Protective measures
Respiratory protection: wear gas masks when the concentration in the air is high. Self contained breathing apparatus should be worn in emergency rescue or escape.  
Eye protection: wear safety glasses.  
Protective clothing: wear tight sleeved work clothes and long rubber shoes.  
Hand protection: wear rubber gloves.  
Others: smoking, eating and drinking are prohibited at the work site. Change work clothes in time. Do not drink alcohol before and after work and take a bath with warm water. Conduct pre employment and regular physical examination.  
3、 First aid measures
Skin contact: take off contaminated clothes and wash thoroughly with soapy water and clean water.  
Eye contact: lift the eyelids immediately and rinse with a large amount of flowing water or normal saline.  
Inhalation: quickly leave the site to a place with fresh air. Give oxygen when breathing is difficult. When breathing stops, carry out artificial respiration immediately. See a doctor.  
Ingestion: gargle, drink water, take activated carbon orally after gastric lavage, and then give catharsis. See a doctor.  
Fire extinguishing method: mist water, foam, carbon dioxide, dry powder and sand.