11. Determine the number of atomic structure centers: 0
12. Number of uncertain atomic structure centers: 0
13. Determine the number of chemical bond structural centers: 0
14. Number of indeterminate chemical bond structure centers: 0
15. Number of covalent bond units: 1[1]
Properties and stability
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1. Stability: stable
2. Prohibited compounds: strong oxidants, alkali metals, alkaline earth metals, heavy metals, especially copper, heavy metal salts, halogens
3. Conditions to avoid contact: heating
synthetic method
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By iodomethane orDimethyl sulfateIt is obtained by reacting with sodium acetylene or Grignard reagent of acetylene.
purpose
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1. It is used to manufacture acetone, etc.
matters needing attention
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Hazard Overview
Health hazard: acute inhalation may stimulate respiratory tract, causingbronchitisandpneumonia;It has anesthetic effect.
Flammability hazard: This product is flammable and irritant.[2]
Leakage emergency treatment
Quickly evacuate the personnel in the leakage contaminated area toUpwind, and isolate, strictly restrict access.Cut off the ignition source.It is suggested that emergency handling personnel should wear self sufficiencyPositive pressure respirator, wearAntistatic clothing。Cut off the leakage source as much as possible.Cover the sewer and other places near the leakage point with industrial coating or adsorption/absorbent to prevent gas from entering.Reasonable ventilation to accelerate diffusion.Dilute and dissolve with spray water.Build a dike or dig a pit to collect a large amount of wastewater generated.If possible, use an exhaust fan to send the leaked gas to an open place or install an appropriate nozzle to burn it.Leaking containers shall be properly treated, repaired and inspected before reuse.[2]
Other protection: smoking is strictly prohibited at the work site.Avoid long-term repeated contact.When entering tanks, confined spaces or other high concentration areas for operation, someone must supervise.[2]
Operation precautions
Closed operation, full ventilation.Operators must be specially trained and strictly abide by the operating procedures.Recommended for operatorsFilter gas mask(Half mask), wearAntistatic clothing。Keep away from kindling and heat sources, and smoking is strictly prohibited in the workplace.Use explosion-proof ventilation systems and equipment.Prevent gas leakage into the air of the workplace.Avoid contact with oxidants and halogens.During transmission, the cylinder and container must be grounded and bridged to preventstatic electricity。The cylinder and accessories shall be handled with care to prevent damage.Fire fighting equipment and leakage emergency treatment equipment of corresponding types and quantities shall be provided.[2]
Transportation precautions
The railway transportation shall be reported to the railway bureau for trial operation, which lasts for two years.After the test run, a test run report shall be written and submitted to the Ministry of Railways to officially announce the transportation conditions.When using steel cylinders for transportation, it is necessary to wearsafety hat。Cylinders are generally placed horizontally, and the mouth of the cylinder should be in the same direction, not crossed;The height shall not exceed the protective fence of the vehicle, and shall be firmly clamped with triangular wood pad to prevent rolling.The transport vehicles shall be equipped with corresponding types and quantities of fire-fighting equipment.The exhaust pipe of the vehicle transporting this article must be equipped with a fire retardant device. It is prohibited to use mechanical equipment and tools that are easy to generate sparks for loading and unloading.It is strictly prohibited to mix with oxidants, halogens, edible chemicals, etc.Transport in the morning and evening in summer to prevent sunlight exposure.Keep away from kindling and heat sources during stopover.Road transportation shall be carried out according to the specified route, and it is forbidden to stay in residential areas and densely populated areas.It is forbidden to slip during railway transportation.[2]
Precautions for storage
Store in a cool and ventilated warehouse.Keep away from kindling and heat sources.The warehouse temperature should not exceed 30 ℃.It shall be stored separately from oxidants and halogens, and mixed storage is strictly prohibited.Explosion proof lighting and ventilation facilities shall be adopted.It is prohibited to use mechanical equipment and tools that are easy to generate sparks.The storage area shall be equipped with leakage emergency treatment equipment.[2]
Regulatory information
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Regulations on the Safety Management of Dangerous Chemicals (issued by the State Council on February 17, 1987), detailed rules for the implementation of the Regulations on the Safety Management of Dangerous Chemicals (HLF [1992] No. 677), regulations on the safe use of chemicals in the workplace (LBF [1996] No. 423) and other regulations have made corresponding provisions on the safe use, production, storage, transportation, loading and unloading of dangerous chemicals;The classification and signs of commonly used hazardous chemicals (GB 13690-92) classify the substance as Class 2.1 flammable gas.[2]