Welan gum
(Redirected from Welan)
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| ECHA InfoCard | Lua error in Module:Wikidata at line 880: attempt to index field 'wikibase' (a nil value). Lua error in Module:Wikidata at line 880: attempt to index field 'wikibase' (a nil value).Lua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value). |
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| E number | Lua error in Module:Wikidata at line 880: attempt to index field 'wikibase' (a nil value). |
CompTox Dashboard (EPA)
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| Properties | |
| Appearance | white to cream colored powder |
| Density | 26.25 lbs/ft³ (bulk) |
| Hazards | |
| NFPA 704 (fire diamond) | |
| Safety data sheet (SDS) | [1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Welan gum is an exopolysaccharide used as a rheology modifier in industrial applications such as cement manufacturing.[1] It is produced by fermentation of sugar by bacteria of the genus Alcaligenes. The molecule consists of repeating tetrasaccharide units with single branches of L-mannose or L-rhamnose.[2] In solution, the gum retains viscosity at elevated temperature, and is stable in a wide pH range, in the presence of calcium ion, and with high concentration of glycols.[3][4][5]
See also
[edit | edit source]References
[edit | edit source]- ^ US patent 5004506, Allen, Floyd L.; Best, Glen H. & Lindroth, Thomas A., "Welan gum in cement compositions", issued Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value)., assigned to Merck & Co., Inc.
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External links
[edit | edit source]- Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
