Basic Information

Hydrogen chloride, known as HCl, is a compound composed of two chemical elements: hydrogen (H) and chlorine (Cl). Under ambient conditions of normal temperature and pressure, hydrogen chloride appears as a gas. From the microscopic level, a hydrogen chloride molecule is formed by a hydrogen atom and a chlorine atom closely bonded by covalent bonds, and this unique atomic combination determines the chemical properties of hydrogen chloride.

CAS No.: 7647-01-0

EINECS No.: 231-595-7

UN No.: UN1050

Purity: 99.9%, 99.999%

Dot Class: 2.3

Appearance: Colorless

Grade Standard: Chemical Grade; Electronic Grade

Physical Properties

Chinese name : 氯化氢 

English name : Hydrogen chloride

Chemical formula : HCl

Molecular weight : 36.461

CAS : 7647-01-0

EINECS : 231-595-7

Melting point  :  -114.2℃

Boiling point  :  -85.1 ℃

Water soluble :  easily soluble

Appearance :  colorless gas

Density  : 1.639 kg/m3 (0 °C, 0.1 MPa)

Use

Chemical industry

In the chemical industry, hydrogen chloride is a key base material for the production of important plastics such as polyvinyl chloride (PVC). PVC, as a plastic material widely used in construction, packaging, electronics and many other industries, its production process is inseparable from hydrogen chloride. In addition, hydrogen chloride is often used in various addition reactions and substitution reactions in organic synthesis reactions. Through these chemical reactions, a variety of organic compounds with different structures and functions can be prepared, which provides important support for the development of organic synthesis chemistry.

Pharmaceutical field

Hydrogen chloride plays an indispensable role in pharmaceutical processes. On the one hand, it is used to adjust the pH of the reaction system to create a suitable chemical environment for the drug synthesis reaction, so as to promote the smooth progress of the drug synthesis reaction. On the other hand, hydrogen chloride itself is also the synthetic raw material of some drugs, which directly participates in the construction process of drug molecules, which is of great significance to ensure the quality and efficacy of drugs.

Metallurgical industry

Hydrochloric acid (i.e. aqueous solution of hydrogen chloride) is widely used in the metal surface treatment process in the metallurgical industry due to its corrosive properties. By soaking the metal in hydrochloric acid solution, the oxides and impurities on the metal surface can be effectively removed, so that the metal surface can be cleaned and activated, laying a good foundation for the subsequent metal processing and treatment process, and improving the quality and performance of metal products.

Food industry

 In the food industry, hydrogen chloride also has unique applications. It can be used in the production of food additives, for example, in the processing of some food, the appropriate addition of hydrochloric acid can adjust the acidity of food, so as to improve the taste and quality of food, so that food more in line with the taste needs of consumers.

 Transportation

Transportation Mode

Since hydrogen chloride gas is corrosive and toxic and poses a potential threat to transportation safety, it is usually transported in special cylinders during transportation. For hydrogen chloride gas that needs to be transported in large quantities, specially designed tank trucks are used. These tank trucks have good sealing and pressure resistance, which can ensure that hydrogen chloride gas will not leak during transportation and ensure the safety and reliability of transportation.

Safety Measures

In the process of transportation, ensuring the safety and reliability of transportation equipment is the first priority, and strict measures must be taken to prevent gas leakage. Transport vehicles need to be equipped with corresponding emergency treatment equipment, such as all kinds of leakage emergency tools and protective equipment, so as to be able to take effective response measures quickly in case of accidents. At the same time, transportation personnel must undergo professional training, be familiar with the characteristics of hydrogen chloride gas and transportation safety regulations, strictly abide by the transportation safety operation procedures, to ensure the safe completion of transportation tasks.

Storage

Storage environment

 Hydrogen chloride gas should be stored in a cool and well-ventilated special storage room. The warehouse should be away from fire and heat source to avoid safety accidents caused by high temperature or open fire. At the same time, the temperature in the warehouse should not exceed 30℃. Maintaining an appropriate temperature environment is very important to ensure the stability and storage safety of hydrogen chloride gas.

Storage container

hydrogen chloride gas must be stored in cylinders or tanks that meet national standards. These cylinders and storage tanks need to be inspected and maintained regularly to ensure good sealing and pressure resistance, prevent gas leakage caused by aging and damage of the container, and ensure the safety and reliability of the storage process.

Safety management

 obvious warning signs should be set up in the storage area to remind personnel to pay attention to safety. At the same time, the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment should be equipped, so as to timely rescue and treatment in case of fire or leakage accident. In addition, the system of double receiving and sending and double storage is implemented to strictly control the storage amount and storage period, and further strengthen the safety guarantee of the storage process from the management level.