Hazard class · Division guide
Dangerous When Wet (Class 4.3) Storage
Class 4.3 materials react with water to emit flammable gases. Moisture control and separation from water-based suppression assumptions are critical.
Class, Division, and GHS meaning
Division 4.3 sits under DOT Class 4 (flammable solids / dangerous-when-wet materials). Notes about contact with water emitting flammable gases belong here even when a flammable-solid phrase also appears.
Storage implications for rental buildings
Keep containers dry, elevated above potential wet floors, and isolated from aqueous incompatibles. Confirm whether water is an acceptable extinguishing agent before selecting a building and fire-protection package.
Flammable vs non-flammable within this class
Chemicals in this category (2)
Mapped from free-text hazard class values in Chemical DB. Always verify against the manufacturer SDS.
Flammable hazardFlammable Storage
Non-flammableNon-Flammable Storage