Typically, the identity of a substance can be described by a: chemical name, for example, benzene; number, for example, EC number 200-753-7, and. chemical composition, for example, >99 % benzene and <1 % toluene.
Typically, the identity of a substance can be described as a: chemical name, for example, benzene chemical composition, for example, >99% benzene and <1% toluene. The composition is determined by chemical analysis.
