Overview of the pictogram-phrase combinations for laboratories of the DGUV Explosive Danger to life CMR substance cat. 1 Corrosive to skin/ metals Extremely flammable Toxic CMR substance cat. 2 Irritant ? Untested research substance Highly flammable Harmful to health Damages organs if inhaled in contact with skin if swallowed Flammable Narcotic Can damage organs Contact with water or acids liberates toxic gas Explosive when dry Pyrophoric Allergenic if inhaled Aspiration dangerous to life Can age dangerously Oxidising agent Allergenic in contact with skin Reacts violently with water