Sucrose, also known as table sugar, granulated sugar, or simply "sugar," is derived from sugar cane or beetroot. The source does not affect the final product.

The main source of sucrose in ganaches is the chocolate used, and it is the most common sugar found in confections.

Sucrose is composed of one glucose and one fructose molecule, bonded together, and because of this structure, it is referred to as a "disaccharide." 
Di = two
Sacharride = sugar