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.

This organic chemistry article is a stub.

NFPA 704 four-colored diamond Health 1: Exposure would cause irritation but only minor residual injury. E.g. turpentine Flammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oil Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code