Chrysotile
|
Amosite
|
Crocidolite
|
What is asbestos?
Asbestos is the name for a group of naturally occurring silicate minerals that can be separated into fibers. The fibers are strong, durable, and resistant to heat and fire.
There are several types of asbestos fibers, of which three have been used for commercial applications: (1) Chrysotile, or white asbestos, comes mainly from Canada, and has been very widely used in the US. It is white-gray in color and found in serpentine rock. (2) Amosite, or brown asbestos, comes from southern Africa. (3) Crocidolite, or blue asbestos, comes from southern Africa and Australia.
Amosite and crocidolite are called amphiboles. This term refers to the nature of their geologic formation.
Other asbestos fibers that have not been used commercially are tremolite, actinolite and anthophyllite, although they are sometimes contaminants in asbestos-containing products.
Resources
|
FedReg. Doc. 05-14510 Coal mine and metal and nonmetal mine safety and health: Asbestos exposure limit; public hearings (07/29/2005)
|
Comments submitted for Proposed Rule 05-14510 See Comments
This docket contains all comments submitted to date for the proposed rule published July 29, 2005. |
A complete library of comments in PDF. See Comments
This docket contains all comments for the hearings which closed on June 27, 2002. |
Web Links
Government Sites
Colleges and Universities
Other Sites
|
|