Corrosive chemicals

Strong Acids
Sulfuric Acid
Hydrochloric Acid
Nitric Acid
Phosphoric Acid
Perchloric Acid

Strong Bases (Alkalis)
Sodium Hydroxide (Caustic Soda)
Potassium Hydroxide
Ammonium Hydroxide
Calcium Hydroxide (Slaked Lime)
Lithium Hydroxide

Organic Corrosive Substances
Acetic Acid (Glacial)
Formic Acid
Phenol (Carbolic Acid)
Trichloroacetic Acid
Lactic Acid (in concentrated form)

Inorganic Corrosive Compounds
Hydrogen Fluoride / Hydrofluoric Acid
Chromic Acid
Aluminum Chloride (anhydrous)
Ferric Chloride
Zinc Chloride

Corrosive Gases
Chlorine
Sulfur Dioxide
Bromine
Ammonia (concentrated)
Hydrogen Chloride (gas)