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Triangle Park, NC: National Institute of Environmental Health and Safety, 2016. Silica Dust, Crystalline, In the Form of Quartz or Cristobalite, IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Volume 100C. ��%�P�x��An�� Commonly-known examples are quartz, agate, onyx, jasper, vermiculite, tac, and feldspar. Washington, DC: U.S. Department of Labor. 0000003189 00000 n
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Exposure to tiny particles of airborne silica, primarily quartz dust, occurs mainly in industrial and occupational settings. The primary route of exposure for the general population is inhaling airborne silica while using commercial products containing quartz. Crystalline silica comes in several forms, with quartz being the most common. Though it makes up twenty-eight percent of the planet by weight, pure silicon is rare: most of the silicon in the earth’s crust is bonded with oxygen. 0000009589 00000 n
When inhaled, these particles can penetrate deep into the lungs. 0000005486 00000 n
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Washington, DC: U.S. Department of Labor, 2002. 0000001349 00000 n
These products include cleansers, cosmetics, art clays and glazes, pet litter, talcum powder, caulk, and paint. 0000005463 00000 n
Silica in free and combined forms is a dominant component of the solid material of many soils, and dissolved silica is commonly a major solute of soil solutions. Quartz is the most common form of crystalline silica. The silica content of rice has been related to the silicasesquioxide ratio of soils (Ueda et at., 1957), but a better assessment of the available silica in a soil may be obtained from the ratio of easily extractable silica to the "free" or easily extractable sesquioxides. Quartz dust is respirable crystalline silica, which means it can be taken in by breathing. 0000014694 00000 n
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Atlanta, GA: Centers for Disease Control and Prevention, 2014. Atlanta, GA: Centers for Disease Control and Prevention, 2010. trailer
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SiO2 (silica) in soil The median SiO2 content in subsoil is 68.0% and in topsoil 67.7%, and he range of values varies from 0.61 to 98.1% in subsoil and 1.47 to 96.7% in topsoil. It is also found in concrete, brick, mortar, and other construction materials. The strongest link between human lung cancer and exposure to respirable crystalline silica has been seen in studies of quarry and granite workers and workers involved in ceramic, pottery, refractory brick, and certain earth industries. Quartz dust is respirable crystalline silica, which means it … An abundant natural material, crystalline silica is found in stone, soil, and sand. 655 0 obj
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OSHA Fact Sheet: Crystalline Silica Exposure Health Hazard Information. Crystalline silica comes in several forms, with quartz being the most common. ��]����wE��(~��]�4R��z�?6��,9ݦVnc��TmøT�N�Ǟ�R�'g\eZd3�~��Z��t. KeyWords:Cropproduction,fertilizer,monosilicicacid,nutrient,silicon, soil fertility (Soil Sci 2016;181: 00–00) 0000008210 00000 n
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For example, workers who use handheld masonry saws to cut materials such as concrete and brick may be exposed to airborne silica. 0000011766 00000 n
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Preventing Silicosis and Deaths in Construction Workers. H��WMo�8��W�R�E]f�MEM����c.���Z8R �����}�c{E���ER�7��7ë_��竟�?�1b_�|�v���5lq������jq�Zl��_Wk`W��`�� ���z&$�_�D�9m��$
[=-��6�NJ�n�]��Z�a���f��� �Wgg�љ�mA In the case of permitted digital reproduction, please credit the National Cancer Institute as the source and link to the original NCI product using the original product's title; e.g., “Crystalline Silica was originally published by the National Cancer Institute.”, Complementary & Alternative Medicine (CAM), Coping with Your Feelings During Advanced Cancer, Emotional Support for Young People with Cancer, Young People Facing End-of-Life Care Decisions, Late Effects of Childhood Cancer Treatment, Tech Transfer & Small Business Partnerships, Frederick National Laboratory for Cancer Research, Milestones in Cancer Research and Discovery, Step 1: Application Development & Submission, Control of Silica Dust in Construction: Handheld Power Saws, U.S. Department of Health and Human Services.
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