Silica, Crystalline (Respirable Size)

Respirable crystalline silica, primarily quartz dusts occurring in industrial and occupational settings, is known to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in humans. Respirable crystalline silica was first listed in the Sixth Annual Report on Carcinogens in 1991 as reasonably anticipated to be a …

Crystalline silica technical fact sheet | SafeWork NSW

Crystalline silica is a very common mineral used in manufacturing building products in construction materials. Applying adequate controls such as minimising the generation of …

Crystalline Silica

Learn about crystalline silica (quartz dust), which can raise your risk of lung cancer. Crystalline silica is present in certain construction materials such as concrete, masonry, and brick and also in …

Safe Silica | Crystalline Silica Information | Silicosis Prevention

Answers to all your questions about crystalline silica, respirable crystalline silica (RCS) and what is being done to protect workers' health. See FAQs. Safe Silica is a joint project between industry and trade unions to provide information about crystalline silica and reduce the risk of silicosis in working environments.

Recognizing and understanding silica-polymorph microcrystals in …

1. Introduction. Silica (SiO 2) is a widespread compound increasingly used for a number of diverse industries: among others, glass making, foundry sand, ceramic manufacture (ware, glazes, enamels, etc) or chemical uses [1].Silica exists in three distinct polymorphs at atmospheric pressure: quartz, cristobalite and tridymite. All of them have …

Silica Classification and Labelling REACH | Safe Silica

REACH classification and labelling. The producers of crystalline silica and products containing it adhere to the principles of product stewardship: they manage their products in a responsible way by minimising the health, safety, environmental, and social impacts of a product throughout all lifecycle stages. Regarding the potential risks from ...

Respirable Crystalline Silica

Introduction. Crystalline silica is the name for a group of naturally occurring minerals found in many types of rock. It can be released into the air when the rock or articles made from the rock are crushed, cut, or worked in some other way. It is the fine fraction of the dust, the respirable fraction, that is harmful to health when inhaled.

CDC

Silica, crystalline (as respirable dust) Colorless, odorless solid. [Note: A component of many mineral dusts.] NIOSH. (APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The following filters may also be used: N99, R99, P99, N100, R100 ...

Crystalline silica-induced leukotriene B4-dependent

Chronic exposure to crystalline silica (CS) causes silicosis, an irreversible lung inflammatory disease that may eventually lead to lung cancer. In this study, we demonstrate that in K-rasLA1 mice ...

Crystalline Silica: Exposure Assessment | NIOSH | CDC

NIOSH Method 7602 – Silica, Crystalline, by IR. This method is recommended if there are minimal amounts of amorphous silica and silicates in the sample. There are potential interferences with this method that are difficult to identify without the help of an experienced geologist. NIOSH Method 7603 – Silica in Coal Mine Dust.

Silica, Crystalline

Crystalline silica is a common mineral found in many naturally occurring materials and used in many industrial products and at construction sites. Materials like sand, …

U.S. SILICA COMPANY SAFETY DATA SHEET

Acute Silicosis can occur after the repeated inhalation of very high concentrations of respirable crystalline silica over a short time period, sometimes as short as a few months. The symptoms of acute silicosis include progressive shortness of breath, fever, cough, weakness and weight loss. Acute silicosis is fatal.

Nearly free silanols drive the interaction of crystalline silica

Crystalline silica (CS) is a well-known hazardous material that causes severe diseases including silicosis, lung cancer, and autoimmune diseases. However, the hazard associated to crystalline silica is extremely variable and depends on some specific characteristics, including crystal structure and surface chemistry.

Crystalline Silica Dust

The leaflet explains what crystalline silica is, in what workplaces it is found, how workers can be exposed, what health effects might occur and how to prevent risks …

29 CFR § 1926.1153

The purpose of this Appendix is to provide medical information and recommendations to aid physicians and other licensed health care professionals (PLHCPs) regarding compliance with the medical surveillance provisions of the respirable crystalline silica standard (29 CFR 1926.1153).Appendix B is for informational and guidance purposes only and none of …

Crystalline Silica Dust

Crystalline silica is widely found in nature. Where concrete, stone or sand based materials are used, there is a potential for exposure to crystalline silica dust. Year : 2022. Download: Crystalline-Silica-Dust---Information-Sheet.pdf (1690 KB)

Mechanisms of crystalline silica-induced pulmonary toxicity …

Crystalline silica particles, following their entry into the respiratory system, are engulfed by alveolar macrophages (AMs) for their detoxification. The interaction between silica particles and AM may result in a cascade of cellular events including the activation of transcription factors and the release of ROS, reactive nitrogen species (RNS ...

Crystalline silica exposure

Silica is used in a wide variety of materials including concrete, cement, asphalt, bricks, and stone (granite) countertops. Workers may be exposed to crystalline silica dust through activities such as sanding, cutting, drilling, grinding, crushing, demolition, and the cleanup of silica-based materials. Workers may also be exposed to the dust ...

Respirable Crystalline Silica Standard Proposal

MSHA's Proposed Respirable Crystalline Silica Standard. by: William K. Doran, Margaret S. Lopez of Ogletree, Deakins, Nash, Smoak & Stewart, P.C. - Our Insights. The Mine Safety and Health ...

How to Reduce Exposure to Respirable …

If this is not possible, engineering controls need to be set up. Most silica dust control methods imply using tools and equipment that feed water to the work surface to keep dust away. NIOSH tested a water …

Toxicological Profile for Silica

The principal audiences for the toxicological profiles are health professionals at the Federal, State, and local levels; interested private sector organizations and groups; and members of the public. This profile reflects ATSDR's assessment of all relevant toxicologic testing and information that has been peer-reviewed.

Silica Emergency Temporary Standard

Silica is a natural mineral that comes in diferent forms. The crystalline forms are far more hazardous, especially when employees are exposed to airborne particle sizes smaller than the diameter of a human hair. This is known as "respirable" dust. Breathing too much airborne respirable crystalline silica (RCS) can cause: Lung cancer.

Crystalline silica induces macrophage necrosis and causes …

Crystalline silica (CS), an airborne particulate, is a major global occupational health hazard. While it is known as an important pathogenic factor in many severe lung diseases, the underlying mechanisms of its toxicity are still unclear. In the present study, we found that intra-tracheal instillation of CS caused rapid emergence of necrotic ...

Silica, Crystalline

OSHA's Respirable Crystalline Silica standard for construction requires employers to limit worker exposures to respirable crystalline silica and to take other steps to protect workers. The standard provides flexible alternatives, which OSHA expects will be especially useful for small employers. Employers can either use the control methods laid ...

Occupational Exposure to Respirable Crystalline Silica; …

Hazard communication--Including 29 CFR 1910.1053(j)(1) and 29 respirable crystalline silica in the CFR 1926.1153(i)(1). program established to comply with the hazard communication standard (29 CFR 1910.1200) and ensuring that each employee has access to labels on containers of crystalline silica and safety data sheets.

CRYSTALLINE SILICA PRIMER

Crystalline silica is the scientific name for a group of minerals composed of silicon and oxygen. The term crystalline refers to the fact that the oxygen and silicon atoms are arranged in a three- dimensional repeating pattern. This group of minerals has shaped human history since the beginning of civilization.

Respirable Crystalline Silica Exposure, Smoking, and Lung …

Occupational exposure to respirable crystalline silica (silica hereafter) occurs in tens of millions of workers globally in a wide range of industries, including construction, mining, and quarrying, as well as manufacturing of bricks, ceramics, and metal products (1, 2).Silica is classified as a human lung carcinogen by the International …

CHEMICAL AND PHYSICAL INFORMATION

Table 4-4. Physical and Chemical Properties of Synthetic Amorphous Silica Compounds. Silica occurs naturally in crystalline and amorphous (or non-crystalline) forms, herein referred to as c-silica and a-silica, respectively. Silica has one general Chemical Abstract Service registry number (CASRN ) and more specific CASRNs for ...

Crystalline Silica Primer | U.S. Geological Survey

Crystalline silica is the scientific name for a group of minerals composed of silicon and oxygen. The term crystalline refers to the fact that the oxygen and silicon atoms are arranged in a threedimensional repeating pattern. This group of minerals has shaped human history since the beginning of civilization. From the sand used for making glass to …