The number is the primary CAS registry number for fumed silica (also known as pyrogenic silica), a versatile synthetic material used extensively across modern industry. The Science of Fumed Silica
: It acts as an anti-sagging agent, preventing paint from dripping off vertical surfaces. 112945
Fumed silica is a non-crystalline (amorphous) form of silicon dioxide ( SiO2cap S i cap O sub 2 The number is the primary CAS registry number