Boron carbide (chemical formula approximately B4C) is an extremely hard boron–carbon ceramic, and covalent material used in tank armor, bulletproof vests, engine sabotage powders,
B 8847 (OTTO) Boron carbide, 5 µm, ≥ 98% Cas 12069-32-8 - used in tank armor, bulletproof vests, engine sabotage powders, as well as numerous industrial applications.