Actinolite
A basic calcium, magnesium, iron silicate, one of six naturally occurring fibrous minerals forming the group called asbestos. Occurs as translucent bright- to gray-green tough interlocking fibers which are flexible and elastic. Actinolite has not been used commercially, although it is sometimes a contaminant in asbestos-containing products.
A basic calcium, magnesium, iron silicate, one of six naturally occurring fibrous minerals forming the group called asbestos. Occurs as translucent bright- to gray-green tough interlocking fibers which are flexible and elastic. Actinolite has not been used commercially, although it is sometimes a contaminant in asbestos-containing products.
Amosite
A basic calcium, magnesium, iron silicate, one of six naturally occurring fibrous minerals forming the group called asbestos. Occurs as straight, brittle fibers, light gray to pale brown in color. Commonly used in commercial asbestos products.
A basic calcium, magnesium, iron silicate, one of six naturally occurring fibrous minerals forming the group called asbestos. Occurs as straight, brittle fibers, light gray to pale brown in color. Commonly used in commercial asbestos products.
Amphibole
One of the two subgroups of minerals forming the asbestos group, distinguished by their chain-like crystal structure and chemical composition. Asbestos amphiboles include actinolite, amosite, anthophyllite, crocidolite, and tremolite.
One of the two subgroups of minerals forming the asbestos group, distinguished by their chain-like crystal structure and chemical composition. Asbestos amphiboles include actinolite, amosite, anthophyllite, crocidolite, and tremolite.
Asbestos bodies (aka ferruginous bodies)
Asbestos bodies are a subset of ferruginous bodies, the structures formed when iron-protein deposition occurs on fibers in the body. Because asbestos is by far the most commonly occurring core material, the presence of ferruginous bodies in sputum indicates a significant past exposure to asbestos.
Asbestos bodies are a subset of ferruginous bodies, the structures formed when iron-protein deposition occurs on fibers in the body. Because asbestos is by far the most commonly occurring core material, the presence of ferruginous bodies in sputum indicates a significant past exposure to asbestos.
Chrysotile
Basic silicate of magnesium, one of six naturally occurring fibrous minerals forming the group called asbestos. White in color, the only mineral of the serpentine subgroup of asbestos. Constituted up to 95% of all industrial asbestos.
Basic silicate of magnesium, one of six naturally occurring fibrous minerals forming the group called asbestos. White in color, the only mineral of the serpentine subgroup of asbestos. Constituted up to 95% of all industrial asbestos.
Crocidolite
A fibrous sodium iron chain silicate of the amphibole subgroup of asbestiform minerals, often called "blue asbestos" due to color ranging from Prussian and indigo blue to yellow green. Its fibers generally resemble strands of fine textured hair which can usually bend beyond 90° before breaking. One of three common forms of asbestos found in building materials, formerly constituting about 4% of the world total production of asbestos.
A fibrous sodium iron chain silicate of the amphibole subgroup of asbestiform minerals, often called "blue asbestos" due to color ranging from Prussian and indigo blue to yellow green. Its fibers generally resemble strands of fine textured hair which can usually bend beyond 90° before breaking. One of three common forms of asbestos found in building materials, formerly constituting about 4% of the world total production of asbestos.
Friable
Of a material which when dry, may be crumbled, crushed, pulverized, or reduced to powder by normal hand pressure.
Of a material which when dry, may be crumbled, crushed, pulverized, or reduced to powder by normal hand pressure.
Respirator
A device to protect the wearer from inhalation of harmful contaminants, classified by the amount of face coverage it provides and its method of protection, e.g. a half-face, negative-pressure, air-purifying respirator; or a full-face, pressure demand, supplied air respirator.
A device to protect the wearer from inhalation of harmful contaminants, classified by the amount of face coverage it provides and its method of protection, e.g. a half-face, negative-pressure, air-purifying respirator; or a full-face, pressure demand, supplied air respirator.
Serpentine
One of the two major groups of minerals which form asbestos, distinguished by a tubular structure and chemical composition. Chrysotile, by far the most abundant variety of asbestos, is the only type of asbestos belonging to the serpentine group.
One of the two major groups of minerals which form asbestos, distinguished by a tubular structure and chemical composition. Chrysotile, by far the most abundant variety of asbestos, is the only type of asbestos belonging to the serpentine group.
Silicosis
A form of chronic lung disease which develops after prolonged exposure to silica (quartz) dust.
A form of chronic lung disease which develops after prolonged exposure to silica (quartz) dust.
State of the art
Latest most effective and reliable, superseding earlier standards.
Latest most effective and reliable, superseding earlier standards.
TLV defense
Threshold Limit Values (TLVs) are much-criticized air contaminant standards for the workplace devised and published by a private organization called the American Conference of Governmental Industrial Hygienists (ACGIH) and adopted by the Occupational Safety and Health Administration (OSHA). The typical TLV defense, used as a shield from liability in personal injury lawsuits, quotes the ACGIH saying that TLVs are "thought to be safe for workers -- based on the best available information."
Threshold Limit Values (TLVs) are much-criticized air contaminant standards for the workplace devised and published by a private organization called the American Conference of Governmental Industrial Hygienists (ACGIH) and adopted by the Occupational Safety and Health Administration (OSHA). The typical TLV defense, used as a shield from liability in personal injury lawsuits, quotes the ACGIH saying that TLVs are "thought to be safe for workers -- based on the best available information."
Tremolite
A basic calcium, magnesium, iron silicate, one of six naturally occurring fibrous minerals forming the group called asbestos. Occurs as translucent bright- to gray-green tough interlocking fibers which are flexible and elastic. Tremolite has not been used commercially, although it is sometimes a contaminant in asbestos-containing products.
A basic calcium, magnesium, iron silicate, one of six naturally occurring fibrous minerals forming the group called asbestos. Occurs as translucent bright- to gray-green tough interlocking fibers which are flexible and elastic. Tremolite has not been used commercially, although it is sometimes a contaminant in asbestos-containing products.
Vermiculite
A lightweight and highly water-absorbent micaceous mineral that is sometimes used as a substitute for asbestos.
A lightweight and highly water-absorbent micaceous mineral that is sometimes used as a substitute for asbestos.
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