"Aqueous cleaning solvent" means a cleaning solvent in which water is the primary ingredient (at least 80 percent of the cleaning solvent solution, as applied, must be water). Detergents, surfactants, and bioenzyme mixtures and nutrients may be combined with the water, along with a variety of additives, such as organic solvents (e.g., high boiling point alcohols), builders, saponifiers, inhibitors, emulsifiers, pH buffers, and antifoaming agents. Aqueous solutions must have a flash point greater than 93 °C (200 °F) (as reported by the manufacturer), and the solution must be miscible with water.
Ill. Admin. Code tit. 35, § 211.520