Amosite
Amosite, commonly known as brown asbestos, is an amphibole mineral fiber that was the second most commonly used type of asbestos in commercial applications. Its straight, needle-like fibers are more durable in the body than chrysotile and are associated with a high risk of mesothelioma and lung cancer.
Amosite was heavily used in thermal insulation products, cement sheets, pipe insulation, ceiling tiles, and fire protection materials. The name "amosite" is an acronym derived from "Asbestos Mines of South Africa," where the majority of commercial amosite was mined. Production peaked in the mid-20th century before declining due to health concerns.
As an amphibole fiber, amosite has straight, rigid, needle-like fibers that penetrate deep into lung tissue and are extremely resistant to the body's natural clearance mechanisms. Studies have shown that amosite exposure carries a particularly high risk of mesothelioma development, along with asbestosis and asbestos-related lung cancer.
Workers in construction, shipbuilding, and industrial maintenance were most commonly exposed to amosite-containing products. If you worked in these industries before the 1980s, you may have encountered amosite insulation. Understanding your specific exposure history is important for both medical monitoring and legal claims.
- Also known as
- Brown asbestos, Grunerite asbestos
- Category
- Asbestos
- Related terms
- Chrysotile, Crocidolite, Occupational Exposure, Friable Asbestos, Mesothelioma
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