GT gum tragacanth

Details - Egyptians used it as a binder in cosmetics and inks  

Source - dried exudate from stems and branches of Astragalus  

Color - dull white to yellow yellow (orude gum)  

Initial decomposition temperature °c 252.3 Zohuriaan, M J Shokrolahi, F, Polym. Test., 23,575-79,2004. 

Surface tension mN m- 52-64 Faizi, M Yarmand, M S Safari, M Eman-Djomeh, Z Mohammadifar, M A, Int. J. Biol. Macromol., 79, 433-9,2015. 

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