| Identifiers | |
|---|---|
| ECHA InfoCard | 100.118.859 
|
| EC Number |
|
| 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). | |
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-mannoseorL-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]
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