The details:

• Powerful remover for tarnish, rust, and mill scale from carbon steel, mild steel, stainless steel, and cast iron
• Does not attack the underlying metal
• Will not harm plastic, paint, glass, aluminum, copper, brass, nickel, chrome, ceramics, or glazed tile
• Can be used over and over

• Non-poisonous [actually made from materials that comply with the Food Chemicals Codex (FCC) and U. S. Pharmacopeia (USP) specifications.]
• No harsh acids
  • only mildly acidic (At pH = 3.7 to 3.9, it is actually less acidic than lemon juice or household vinegar.)
  • no hazardous, highly corrosive, toxic or volatile acids, such as muriatic acid or phosphoric acid
• No chlorine
• No petroleum distillates
• Odorless
• Non-flammable
• No fumes
• Biodegradable; will not harm the environment
  • Completely water soluble
  • No phosphorus
  • Components are not regulated