sule 6619024 M I N E R A L S P I R I T S 663 Revision 10 2025 Mineral Spirits 663 is a medium-boiling aliphatic solvent consisting primarily of C9-C12 saturated hydrocarbons withSolvent 140 is one of the variants of mineral spirits classified under Rule 66. General Characteristics: Appearance: Clear, colorless liquid Chemical Composition: Hydrocarbon