Which Chemicals Are Harmful to the Human Body?

There are about 8 million chemicals in the world, of which more than 70,000 are commonly used, and thousands of new chemicals are produced every year. There are many toxic chemicals in a wide variety of chemicals, which can be harmful to the human body in the process of production, use, storage, and transportation, causing catastrophic accidents. Therefore, it is necessary to master the basic knowledge about the harm of toxic chemicals.

Metal and metalloid

Common metals and metalloids are lead, mercury, manganese, nickel, beryllium, arsenic, phosphorus, and their compounds.

Irritant gas

It refers to a gas that irritates the eyes and the respiratory tract, which is a toxic gas often encountered in the chemical industry. There are many kinds of irritating gases, the most common ones are chlorine, ammonia, nitrogen oxides, photogas, hydrogen fluoride, sulfur dioxide, sulfur trioxide and dimethyl sulfate.

Asphyxiating gas

It is a toxic gas that can cause oxygen deprivation in the body. Asphyxiating gas can be divided into pure asphyxiation gas, blood asphyxiation gas and cell asphyxiation gas, such as nitrogen, methane, ethane, ethylene, carbon monoxide, nitrobenzene, hydrogen cyanide, hydrogen sulfide, etc.


Pesticides include insecticides, fungicides, acaricide, herbicides, etc. The use of pesticides plays an important role in the production of crops, but the failure to take effective preventive measures in the process of production, transportation, use, and storage can lead to poisoning.

Harmful Chemicals

Organic compound

Most organic compounds are toxic and harmful, such as xylene, carbon disulfide, gasoline, methanol, acetone, etc.

Macromolecular compound

Macromolecules themselves are not toxic or toxic, but they can release free monomers in the process of processing and use. Phenol and formaldehyde, for example, are stimulated by the heat release of phenolic resin. Certain macromolecules are more highly toxic due to heat and oxidation. The polytetrafluoroethylene (PTFE) plastics are subjected to high thermal decomposition of tetrafluoroethylene, hexafluoropropylene, and octane, which can cause chemical pneumonia or pulmonary edema after inhalation.

About the author

Chin Trento

Chin Trento holds a bachelor’s degree in applied chemistry from the University of Illinois. His educational background gives him a broad base from which to approach many topics. He has been working with writing advanced materials for over four years in Stanford Advanced Materials (SAM). His main purpose in writing these articles is to provide a free, yet quality resource for readers. He welcomes feedback on typos, errors, or differences in opinion that readers come across.

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