Asbestos, or what is known in English as amine, is a group of inorganic, mineral, fiber-like materials that are included in the composition of silicate salts, but they differ from them in chemical composition and natural properties due to the different amounts of magnesium, iron, sodium, oxygen and hydrogen in them.
Asbestos has many advantages that make it of commercial value. It does not burn, and it is a poor conductor of heat or electricity. It is also flexible and strong and is unaffected by most chemical compounds. Asbestos can cause serious health problems if inhaled in large quantities. Among these problems is cancer.
When was asbestos discovered?
Asbestos was discovered a long time ago, it was used by the ancient Chinese and Egyptians. The main source of the name asbestos goes back to the Greek language. The word asbestos means combustible and decomposable. In the mid-nineteenth century, the Italians were able to find ways to spin and weave asbestos fibers, and to obtain materials usable in a variety of fields. After that, this industry was developed globally. The first factory to manufacture its materials was opened in 1870 AD in Germany, and in 1900 AD, asbestos was used in the manufacture of cement sheets by the wet method. After that, this substance spread in many uses, especially in the field of construction and industry.
Workers who work in asbestos factories suffer from bronchial cancer
Types of asbestos: There are three types of asbestos:
1 Chrysotile asbestos, symbolized by C A S No. 12001-29-5, is obtained from serpentine rocks, and this type is considered one of the most widely used types in industry. There are indications that this type of asbestos is harmful to health and its chemical formula OH) (5 O2 Si) 3 mg) 4 and from this formula we find that magnesium and silica form the composition of this type.
2 Brown asbestos: It is known as amosite and is symbolized by CAS No. 12172-73-5. It is known commercially as lamphipolis and is obtained from North African mines. It is also called acronium and its chemical formula is OH (22 O8 Si7 Fe)2 and from this formula we find that iron and silica are the components of this Type.
3 Blue asbestos: C A S rebicate No. 12001-28-4 from Africa and Australia is called amphibole and is the fibrous formation of amphibole rebicate. It is believed that this species is the most dangerous species ever to human health. Its chemical formula is 2 (OH)22 O8 Si2 + 3FE2 Na. From the formula it is clear that it is composed of sodium, iron and silica.