Super industrial strength removes tough stains and soils Water-based Biodegradable Alkaline formula inhibits flash rusting pH concentrate = 13; pH ready-to-use = 12.5 Does not contain butyl, chlorinated or petroleum solvents, bleach, ammonia or abrasives Rinses clean Safe on all surfaces except magnesium NSF registered category code C1 registration #059854 Three formulations available: Aerosol, Concentrate and Ready-to-use