Several agents are commonly used for clearing in histology. These include: - _Xylene_: One of the most widely used clearing agents, xylene is effective but also toxic and flammable. - _Toluene_: Similar to xylene, toluene is another effective agent but also poses health risks. - _Chloroform_: Though less commonly used today due to its hazardous nature, chloroform can be an effective clearing agent. - _Cedarwood oil_: A natural alternative, cedarwood oil is less toxic but more expensive and slower in action. - _Limonene_: A less toxic alternative to xylene, derived from citrus fruits, but may have a strong odor.
