Crocidolite
Crocidolite, commonly known as blue asbestos, is an amphibole mineral fiber considered the most dangerous type of asbestos due to its extremely thin, needle-like fibers. These fibers are easily inhaled, penetrate deep into lung tissue, and are the most resistant to biological clearance, resulting in the highest mesothelioma risk per fiber exposure.
Crocidolite fibers are thinner and sharper than other asbestos types, measuring as little as 0.1 micrometers in diameter. This makes them easily airborne, deeply inhalable, and nearly impossible for the body's immune system to remove once lodged in tissue. Epidemiological studies consistently show crocidolite carries the highest risk of mesothelioma per unit of exposure.
While less commonly used than chrysotile or amosite, crocidolite was used in specialized applications including spray-on insulation, pipe lagging, cement products, and acid-resistant gaskets. It was primarily mined in South Africa, Australia, and Bolivia. Commercial use was largely phased out by the 1970s in many countries due to recognized health risks.
Workers who encountered crocidolite products — particularly in shipbuilding, industrial insulation, and mining — face elevated cancer risk even from relatively brief exposures. The extremely long latency period means health effects may not appear for decades. Learn about asbestos exposure sources and your legal rights.
- Also known as
- Blue asbestos, Riebeckite asbestos
- Category
- Asbestos
- Related terms
- Chrysotile, Amosite, Friable Asbestos, Occupational Exposure, Mesothelioma
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