IS 11707:1986 is the Indian Standard (BIS) for glossary of terms relating to asbestos. This standard provides a glossary of terms used in the Indian asbestos and asbestos-cement industry. It compiles and standardizes definitions from various other Indian Standards related to asbestos products to ensure uniform terminology and understanding.
Glossary of terms relating to asbestos
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Definition of 'Asbestos' | A term for a group of naturally occurring fibrous silicate minerals, separable into fibres. | A term applied to a group of silicate minerals... that readily separate into thin, strong fibres that are flexible, heat resistant, and chemically inert. | ASTM D2946-01 |
| Definition of 'Chrysotile' | A fibrous form of the mineral serpentine (hydrated magnesium silicate). Also known as 'white asbestos'. | The fibrous form of the mineral serpentine, which is a hydrous magnesium silicate. Chemical formula is Mg3Si2O5(OH)4. | ISO 7337:1984 |
| Definition of 'Crocidolite' | The fibrous form of the mineral riebeckite (amphibole group). Also known as 'blue asbestos'. | The fibrous form of the amphibole mineral riebeckite. Also known as 'blue asbestos'. | ISO 7337:1984 |
| Definition of 'Asbestos Fibre' (for counting) | A fibre of asbestos mineral. The standard does not specify dimensional criteria for counting. | A particle with a length > 5 µm, a width < 3 µm, and a length-to-width ratio (aspect ratio) of ≥ 3:1. | ISO 10312:2019 |
| Definition of 'Aspect Ratio' | The ratio of the length of a particle to its breadth. | Ratio of the length of a particle to its width. | ISO 10312:2019 |
| Term for 'Asbestos Cement' | Defines 'Asbestos Cement Products' as products consisting of a mixture of asbestos fibre, ordinary Portland cement or high alumina cement, and water. | Term not defined, as the standard's scope is air analysis methodology, not commercial building products. | ISO 10312:2019 |