What Is Asbestos? Definition And Facts
asbestos definition
Asbestos refers to a group of naturally occurring silicate minerals composed of fine, durable fibers. These fibers are resistant to heat, fire, and chemicals, making asbestos useful in various industrial and commercial applications. However, it is also a known human carcinogen, meaning it can cause cancer upon inhalation or ingestion.
Types of Asbestos
There are six primary types of asbestos minerals, divided into two categories: serpentine and amphibole. Chrysotile, the only serpentine type, is the most commonly used form and accounts for about 90% of asbestos in buildings. Amphibole types include amosite, crocidolite, tremolite, anthophyllite, and actinolite, which are less common but often more hazardous.
All forms of asbestos are hazardous when fibers become airborne and are inhaled. Their microscopic size allows them to penetrate deep into the lungs, where they can cause inflammation and disease over time.
Historical Use and Regulation
Asbestos was extensively used throughout the 20th century in construction materials like insulation, roofing, and flooring. Its durability and affordability made it popular, but by the 1970s, health risks led to strict regulations. Many countries have since banned or limited its use, though existing asbestos remains in older structures.
Today, asbestos is defined as a hazardous material under international health and safety guidelines. Proper handling, abatement, and disposal are required to prevent exposure. Understanding its definition and risks is key to ensuring safety in homes and workplaces.
If you encounter materials that may contain asbestos, always assume they are dangerous until proven otherwise. Professional assessment and remediation are essential for protection.