Astragalus gum sometimes called Astragalus gum (gum tragacanth). Tragacanth is a natural vegetable gum extracted from the shrub bark exudate beans Astragalus genus. Appearance: white powder or translucent flakes, odorless and tasteless. The composition of its main ingredient is potassium, magnesium, calcium, polysaccharide polymer mixture, and the other containing pectinase, can be sol, cellulose, starch, galactose, fructose, xylose, arabinose, etc., is mainly produced in South America and Iran , Greece, Syria. 
 Means produced in the Near East around the leguminous milk vetch is a plant secreted by glial. Expansion in the water can be turned into a transparent gel (Jelly), but part of the soluble colloid-like, non-single material, mainly from the galacturonic acid (galacturonic acid), L-fucose (L-fucose) D- xylose (D-xylose), and yellow Achillea acid (tragacanthicacid) and and and D-galactose (galactose) and L-arabinose (ara-binose) polymerization and polysaccharide composition of its main ingredients, especially the latter branched molecules with complex structure. Used as a bonding agent forming agent, protective colloid, emulsifier, or insect samples