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Hazardous Chemicals Transportation Knowledge: Classification of Dangerous Goods

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Classification of chemical dangerous goods:
(1) Explosives
Such items have easy burning and explosive properties. When subjected to high heat, vibration, friction, impact, etc., or contact with objects such as acids and alkalis, a violent chemical reaction occurs, generating a large amount of gas and heat, and the gas suddenly expands to cause an explosion. According to its nature, it is divided into four categories:
1 Ignition equipment includes different fuses, ignition cords, etc.;
2 detonation equipment, including different explosives, detonators, etc.;
3 Explosives and explosive drugs, including trinitrotoluene (TNT), nitroglycerin mixed explosives, black powder, ammonium nitrate explosives, sodium azide, etc.;
4 Other explosives include shotgun bullets, fireworks and firecrackers (firecrackers).
(2) oxidant
Such items have strong oxidizing properties and may conflict with each other. Except for some organic oxidants, although they do not burn themselves, under certain conditions, substances subjected to friction, shock, high heat or acid and alkali are in conflict with moisture, contact with inflammables, organic matter, reducing agents and nature. When the items are mixed, they can be decomposed, burning and exploding. The nature of the amine oxidant is divided into four categories:
1 primary inorganic oxidant includes alkali metal and alkaline earth metal chlorate and perchlorate (such as potassium chlorate, sodium chlorate, potassium perchlorate, sodium perchlorate, etc.), peroxide (such as potassium peroxide, sodium peroxide) Etc.), and alkali metal and alkaline earth metal nitrates (such as potassium nitrate, sodium nitrate, etc.);
2 primary organic oxidant, including organic derivatives of hydrogen peroxide and nitric acid (such as dibenzoyl peroxide, cerium nitrate, etc.);
3 secondary inorganic oxidants include dichromate, nitrite (such as ammonium dichromate, potassium dichromate, sodium dichromate, potassium nitrite, sodium nitrite, etc.);
4 secondary organic oxidants include peracetic acid, earthworm oil and so on.
For the sake of storage security, based on the above four divisions, it is divided into seven sub-items:
An inorganic derivative of hydrogen peroxide (such as potassium peroxide, sodium peroxide, etc.);
Chlorate, bromate, iodic acid and periodate, perchlorate, etc.;
Aluminium nitrate (sodium nitrate);
Permanganate and dichromate;
Pentanal nitrite
Persulfate and perborate;
An organic derivative of hydrogen peroxide and an organic derivative of nitric acid.
(3) Self-igniting articles
Such articles, in the air of appropriate temperature, do not come into contact with the open flame, rely on their own decomposition and oxidation to generate heat, and reach the burning point of the article, which can cause combustion. Divided into two according to its nature:
1 Class 1 self-igniting articles Decompose or violently oxidize in the air to reach the point of spontaneous combustion (such as yellow phosphorus, nitrocellulose film, etc.);
2Secondary self-igniting articles are slowly oxidized in the air, and the accumulated heat does not disperse, and the articles that cause self-ignition due to the spontaneous ignition point of the articles (such as tarpaulin and its products, oil paper and its products, oil silk and its products, cotton and linen impregnated with vegetable oil, Hair, hair, silk and wild fiber, etc.).
(4) Compressed gas and liquefied gas
The gas is compressed into a compressed gas or a liquefied gas and stored in a pressurized container. Such articles have the property of being thermally expanded regardless of their nature. If the internal pressure is greater than the pressure limit of the container, or the impact causes the container Damage, which can cause the explosion to burn. Some are also toxic, and according to their nature, they are divided into four categories:
1 highly toxic gas, including hydrogen cyanide, liquid chlorine, liquid ammonia, etc.;
2 flammable gas, including acetylene gas, ethane, hydrogen, etc.;
3 combustion-supporting gas, including oxygen;
4 non-combustible gases include helium, argon, helium, nitrogen, and the like.

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