C6H6 is benzene, an organic compound and the simplest aromatic hydrocarbon.
At room temperature, benzene is a colorless, transparent liquid with a special aromatic smell. Its smell is often described as pungent or sweet, which may be related to personal perception differences.It has a lower density than water and is difficult to dissolve in water, but is easily soluble in organic solvents, and it can also be used as an organic solvent itself.The boiling point is 80.1℃, the melting point is 5.5℃, and the density is 0.88g/cm³. The benzene molecule has a special ring system, called the benzene ring, which is composed of six carbon atoms and six hydrogen atoms connected by covalent bonds. The stability of the benzene ring makes it exhibit unique properties in many chemical reactions.
The most important use of benzene in industry is as a chemical raw material. The main uses are as follows:
1. It is used as an important raw material for synthetic dyes, synthetic rubber, synthetic resin, synthetic fiber, synthetic grains, plastics, medicines, pesticides, photographic films and petrochemical products. This product has good solubility, so it is widely used as adhesives and industrial solvents, such as: varnish, nitrocellulose paint diluent, paint stripper, lubricating oil, grease, wax, celluloid, resin, artificial leather and other solvents.
2. Standard sample for measuring refractive index. It can be used as a solvent and cleaning agent for precision optical instruments, electronic industry, etc., organic synthesis, etc.
3. Used as an analytical reagent. Such as a solvent, chromatographic analysis standard substance.
4. Cosmetic solvent. Mainly used as a diluent for cosmetics such as nail polish to accelerate drying and hardening, and to increase the solubility of membrane components such as resin.
5. Used as a solvent and synthetic benzene derivatives, fragrances, dyes, plastics, medicines, explosives, rubber, etc.
Health hazards
Benzene is volatile and can easily spread when exposed to air. When humans and animals inhale or come into contact with a large amount of benzene through their skin, it can cause acute and chronic benzene poisoning. Research reports have shown that part of the cause of benzene poisoning is the conversion of benzene into phenol in the body.
Benzene paralyzes the central nervous system and causes acute poisoning. In severe cases, symptoms such as headache, nausea, vomiting, confusion, loss of consciousness, coma, convulsions, etc. may occur. In severe cases, death may occur due to paralysis of the central nervous system. A small amount of benzene can also cause drowsiness, dizziness, increased heart rate, headache, tremor, confusion, and unconsciousness. Intake of food containing too much benzene can cause vomiting, stomach pain, dizziness, insomnia, convulsions, increased heart rate, and even death. Inhaling 20,000 ppm of benzene vapor for 5 to 10 minutes can be fatal.
Long-term exposure to benzene can cause great damage to the blood, cause chronic poisoning, and cause neurasthenia syndrome. Benzene can damage the bone marrow, reduce the number of red blood cells, white blood cells, and platelets, and cause chromosome abnormalities, leading to leukemia and even aplastic anemia. Benzene can cause heavy bleeding, thereby suppressing the function of the immune system and giving the disease an opportunity to take advantage. Research reports have pointed out that the incubation period of benzene in the body can be as long as 12 to 15 years.
The application of fixed benzene gas detectors is crucial in ensuring the safety of workers and the surrounding community. These detectors are installed in strategic locations where benzene gas exposure is likely to occur, such as near storage tanks, pipelines, and processing units. The detectors continuously monitor the air for benzene gas levels and provide real-time alerts if the concentration exceeds the safe limits.