Accelerators are chemical substances that act as catalysts in the vulcanization process of rubber. They speed up the crosslinking reaction between rubber molecules and sulfur, resulting in stronger, more elastic, and durable rubber products.

Carbon Black is a fine black powder produced by the incomplete combustion or thermal decomposition of hydrocarbons (such as petroleum oil, natural gas, or acetylene) under controlled conditions. It consists mainly of elemental carbon in the form of very small particles with high surface area.

Magnesium Oxide (MgO), also known as Magnesia, is an inorganic compound produced by the thermal decomposition of magnesium carbonate (MgCO₃) or magnesium hydroxide (Mg(OH)₂). It appears as a fine white powder with excellent heat resistance.

Silica (SiO₂), also known as silicon dioxide, is a naturally occurring compound found in sand, quartz, and other minerals. In industrial applications, precipitated silica and fumed silica are the most widely used synthetic forms.