Welan gum

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]

Welan gum

Identifiers
CAS Number	96949-22-3 Y
ECHA InfoCard	100.118.859
EC Number	619-250-2
Properties
Appearance	white to cream colored powder
Density	26.25 lbs/ft³ (bulk)
Hazards
NFPA 704 (fire diamond)	1 1 0
Safety data sheet (SDS)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

See also

• Gellan gum
• Xanthan gum