A 4059 (OTTO) Antimony shot, 6 mm, 99.999% Cas 7440-36-0 - used in bullets, bullet tracers, paint, glass art, and as an opacifier in enamel. A 4059 (OTTO) Antimony shot, 6 mm, 99.999% Cas 7440-36-0 - used as an alloy hardener as well as in metallurgical applications.