sule 66Solvent 140 is one of the variants of mineral spirits classified under Rule 66. General Characteristics: Appearance: Clear, colorless liquid Chemical Composition: HydrocarbonRule 66.1: Application of the Civil Procedure Rules: Rule 66.2: Action on behalf of the Crown: Rule 66.3: Counterclaims, other additional claims, and set-off: Rule 66.4: