Specifically acidic material.
Specifically alkaline (basic) material.
Contains pathogenic biological agents.
Causes destruction of human tissue or corrosion of metals.
Specifically cold-stored liquids or materials.
Substance with oxidizing properties.
Oxidizing gas specifically at standard conditions.
Highly toxic or lethal substance.
Emits ionizing radiation.
Gases that displace air and can cause suffocation.
Reacts violently or explosively with water; do not extinguish with water.
Special notices for specific chemical hazards defined by NFPA 704.