This one was used in Tahrir December 16, after authorities had forbidden use of tear gas on protesters. Photo by @occupyindianapo
Though the marking is abit unclear do to he small size of the photo. One can see the logo it is Combined Tactical systems.
Probably this one. (Though, not 100% confirmed!)
Outdoor Projectiles (100 M) – Description
Specification sheet – 4230
Material Data Safety sheet – MDSD