I believe the main substance involved is called xylene, or possibly methylbenzene.

The Aromatic-related Chemicals segment manufactures and sells xylene isomer and xylene derivatives.

However, for p-xylene the methyl hydrogen directs the second major influence.

The purpose of the xylene is to resoften the fingers.

Archival slides were placed in xylene, destained in alcohol and washed prior to pretreatment.