NIOSH has issued recommendations for employers who manufacture or use carbon nanotubes (CNTs) and carbon nanofibers (CNFs), two types of nanomaterials made of sheets of pure carbon. CNTs and CNFs are used in products to increase strength, durability and heat resistance, among other properties. NIOSH reports that demand for these nanomaterials is expected to grow over the next decade and worker exposure to the particles must be controlled to reduce the potential risk of work-related lung effects.
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