Asbestos

CAS RN:1332-21-4

Major Uses

For asbestos (USEPA/OPP Pesticide Code: 099301) there are 0 labels match. /SRP: Not registered for current use in the U.S., but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./
The chloralkali industry, which uses asbestos to manufacture semipermeable diaphragms that prevent chlorine generated at the anode of an electrolytic cell from reacting with sodium hydroxide generated at the cathode, accounted for nearly 100% of asbestos mineral consumption in 2017 ...
Asbesto is used as a loose fibrous mixture, bonded with other materials (e.g., Portland cement, plastics and resins), or woven as a textile. The range of applications in which asbestos has been used includes: roofing, thermal and electrical insulation, cement pipe and sheets, flooring, gaskets, friction materials (e.g., brake pads and shoes), coating and compounds, plastics, textiles, paper, mastics, thread, fiber jointing, and millboard.
Fireproof fabrics, brake lining, gaskets, roofing composition, electrical and heat insulations, paint filler, chemical filters, reinforcing agent in rubber and plastics, component of paper dryerfelts, diaphagm cells, cement reinforcement.
Selected asbestos products and their end uses: Valve, flange, and pump components; clutch/transmission components; industrial friction components; automotive/truck body coatings; electronic motor components; chemical process piping; water supply piping; conduits for electric wire; commercial/industrial dryer felts; theater curtains and fireproof draperies; gas vapor ducts for corrosive compounds; table pads and heat protective mats; molten glass handling equipment; underlayment for sheet flooring; hoods, vents for corrosive chemicals; chemical tanks and vessel manufacturing; portable construction buildings; electrical switchboards and components; laboratory furniture; and cooling tower components. /Data derived from table/
About 98% of the crocidolite is used in the production of asbestos cement pipe, because of its hardness, brittleness, and high tensile strength, which add to the ridigity of the end product, and its superior filtration qualities, which enhance the drainage of water, permitting cement to dry more rapidly. ... A very large proportion of total asbestos use is accounted for by shorter length fibers. ... /Crocidolite/
Use of asbestos peaked in the late 1960s and early 1970s, when more than 3,000 industrial applications or products were listed. Asbestos has been used in roofing, thermal and electrical insulation, cement pipe and sheets, flooring, gaskets, friction materials, coatings, plastics, textiles, paper, and other products. The U.S. Consumer Product Safety Commission banned use of asbestos in general-use garments, but asbestos may be used in fire-fighting garments if they are constructed to prevent release of asbestos fibers. Domestically used asbestos fibers are classified into seven quality categories or grades. Grades 1, 2, and 3 include the longer, maximum-strength fibers and generally are used in the production of textiles, electrical insulation, and pharmaceutical and beverage filters. Grades 4, 5, and 6 are medium-length fibers used in the production of asbestos cement pipes and sheets, clutch facings, brake linings, asbestos paper, packaging, gaskets, and pipe coverings. Grade 7 includes short fibers generally used as reinforcers in plastics, floor tiles, coatings and compounds, some papers, and roofing felts. ... By the 1990s, chrysotile accounted for more than 99% of ... /USA/ asbestos consumption. By 2008, chrysotile was the only type of asbestos used in the United States; 64% of chrysotile used was categorized as grade 7 asbestos (with fiber lengths less than 3mm), followed by grades 4, 5, and 3.
In the United States, end uses for asbestos have changed significantly over time. Asbestos-cement products, flooring, and friction products were the major markets in the 1960s. By the 1990s, the dominant markets were in roofing and other uses. In 2009, the major use for asbestos in the United States was in roofing compounds, estimated to account for 72% of U.S. consumption, followed by anode coatings used in the chlorine industry with 18% and unknown or unspecified uses with 10%.
... Crocidolite ... /is/ no longer being mined. The current use of ... crocidolite is likely nil or at most a few tons annually sold from old stock. /Crocidolite/
Reinforcing material in vinyl and asphalt flooring products /former use/
Reinforcing pigment in surface coatings and sealants
Reinforcing filler in elastomers for packing and gaskets
Fire and rot resisting material in felts (eg, for roofing)
Raw material for asbestos based paper
Component of textiles (eg, for use in fireproof clothing)
Thermal and electrical insulation medium
Filler in industrial greases
Component of taping compounds
Asbestos cement (AC) pipe, also known as "transite," was a popular choice of engineers for potable water, sanitary sewer, and storm drain pipelines during the 1940s, 1950s, and 1960s. AC pipe was touted for its light weight and ease of handling, low coefficient of friction (Manning's "n" = 0.010), and corrosion resistant properties. An estimated 600,000 miles of AC pipe were installed in the U.S. and Canada. Due to health concerns associated with the manufacturing process, production of AC pipe ceased in the United States in the early 1970s. The U.S. Environmental Protection Agency (EPA) issued a complete ban on all asbestos-containing products in 1979, but was defeated in the U.S. Fifth Circuit Court of Appeals and the ban was lifted. The Court did, however, reinforce the EPA's responsibility to regulate asbestos.
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