thionyl dichloride

Time:2024-08-14 10:22:48Page View:194
  • English name:thionyl dichloride
  • CAS:7719-09-7
  • Purity:more than

Physical and Chemical Properties and Hazardous Characteristics of Sulfonyl Chloride

Chemical name

Chinese name: 氯化亚砜 English name: thionyl chloride Chinese name 2: thionyl chloride English name 2: sulfonyl oxychloride

CAS number: 7719-09-7 Hazard code: 81037 Molecular formula: Cl2OS

Molecular weight: 118.96 Hazard category: Class 8.1 Acidic corrosive substances UN number: 1836


Hazard Overview

Health hazards: Harmful to the body after inhalation, oral or transdermal absorption. It has a strong irritant effect on the eyes, mucous membranes, skin, and upper respiratory tract, and can cause burns. After inhalation, it may be fatal due to laryngeal and bronchial spasms, inflammation, and edema. The symptoms of poisoning may include burning sensation, cough, dizziness, laryngitis, shortness of breath, headache, nausea, and vomiting.

Environmental hazards:

Explosive hazard: This product is non flammable, highly corrosive and irritating, and can cause burns to the human body.


Emergency measures

Skin contact: Immediately remove contaminated clothing and rinse with plenty of flowing water for at least 15 minutes. Seek medical attention.

Eye contact: Immediately lift the eyelids and thoroughly rinse with plenty of flowing water or saline solution for at least 15 minutes. Seek medical attention.

Inhalation: Quickly leave the scene and move to a place with fresh air. Keep the respiratory tract unobstructed. If breathing is difficult, administer oxygen. If breathing stops, immediately perform artificial respiration. Seek medical attention.

Ingestion: Rinse mouth with water and drink milk or egg whites. Seek medical attention.


Fire protection measures

Dangerous characteristics: This product is non flammable and will decompose and release irritating toxic smoke such as sulfur dioxide and hydrogen chloride when exposed to water or moisture. Thermal decomposition can also produce toxic substances. It is corrosive to many metals, especially in the presence of humid air.

Harmful combustion products: hydrogen sulfide, hydrogen chloride, chlorine gas.

Firefighting method: Firefighters must wear full body acid and alkali resistant firefighting suits. Fire extinguishing agents: carbon dioxide, sand. Do not use water.

Emergency response to leakage

Quickly evacuate personnel from the contaminated area to a safe zone, isolate them, and strictly restrict their entry and exit. It is recommended that emergency personnel wear self-contained positive pressure respirators and acid and alkali resistant work clothes. Enter the site from the upwind direction. Cut off the leakage source as much as possible. Minor leakage: Absorb or absorb with sand or other non combustible materials. Massive leakage: Construct embankments or dig pits to contain it. Remove under expert guidance.


Handling and Storage

Precautions for operation: Closed operation, local exhaust. Operators must undergo specialized training and strictly adhere to operating procedures. It is recommended that operators wear self-priming filter type gas masks (full face masks), rubber acid and alkali resistant clothing, and rubber acid and alkali resistant gloves. Prevent steam leakage into the workplace air. Avoid contact with alkaline substances. Pay special attention to avoiding contact with water. Handle with care during transportation to prevent damage to packaging and containers. Equip with emergency response equipment for leaks. Empty containers may contain residual harmful substances.

Storage precautions: Store in a cool and ventilated warehouse. The storage temperature shall not exceed 25 ℃, and the relative humidity shall not exceed 75%. Keep the container sealed. It should be stored separately from alkaline substances and avoid mixing storage. The storage area should be equipped with emergency response equipment for leaks and suitable containment materials.


Contact control and individual protection

China MAC (mg/m3): No standard established. Former Soviet Union MAC (mg/m3): No standard established

Engineering control: Closed operation, local exhaust.

Respiratory protection: When the concentration in the air exceeds the standard, it is necessary to wear a self-priming filter type gas mask (full face mask) or an isolated respirator. Wear self-contained breathing apparatus during emergency rescue or evacuation.

Eye protection: Respiratory protection has been implemented.

Body protection: Wear rubber acid and alkali resistant clothing. Hand protection: Wear rubber acid and alkali resistant gloves.

Other protections: Smoking, eating, and drinking are prohibited at the work site. Smoking, eating, and drinking are prohibited on the work site. After work, take a shower and change clothes.


Physical and chemical properties

Content: Refined products ≥ 90.0%; Level 1 ≥ 85.0%; Level 2 ≥ 80.0. Appearance and Characteristics: Light yellow to red, smoky liquid, with a strong pungent odor.

Solubility: Can be mixed with benzene, chloroform, carbon tetrachloride, etc. Melting point (℃): -105 Boiling point (℃): 78.8 Flash point (℃): meaningless

Combustion heat (kJ/mol): No data available; Relative density (water=1): 1.64; The vapor density (air=1): 4.1 saturated vapor pressure (kPa): 13.3 (21.4 ℃) is mainly used for organic synthesis, pesticides, and pharmaceuticals.

Prohibited substances: air, water, alkaline substances.


Toxicological data

LD50: No data available; LC50: 2435 mg/m3 (rat inhalation)


Transportation information

Packaging method: Glass bottle or plastic drum (can) with a fully open steel drum on the outside; Ordinary wooden box or semi checkered wooden box outside glass bottles or plastic drums (cans); Ordinary wooden box outside frosted or threaded glass bottles; Ordinary wooden box outside the ampoule bottle.

Transportation precautions: During railway transportation, the dangerous goods loading table in the "Dangerous Goods Transport Rules" of the Ministry of Railways should be strictly followed for loading. When shipping, the packaging should be intact and the loading should be secure. During transportation, it is necessary to ensure that the container does not leak, collapse, fall, or be damaged. It is strictly prohibited to mix and transport with alkaline and edible chemicals. Transport vehicles should be equipped with leak emergency response equipment during transportation. During transportation, it should be protected from direct sunlight, rain, and high temperatures. When transporting by road, follow the prescribed route and do not stay in residential or densely populated areas.



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