Hazard class · Division guide
Flammable Gas (Class 2.1) Storage
Flammable gases ignite easily in air and need ignition control, ventilation, and fire-rated or appropriately classified storage when quantities and codes require it.
Class, Division, and GHS meaning
Class 2.1 is the flammable-gas division under DOT Class 2. GHS phrases such as “Flammable Gas Category 1” describe relative flammability severity for the same family of materials.
Storage implications for rental buildings
Use storage designed for flammable gases: control ignition sources, support cylinder/rack workflows, and segregate from oxidizers. Pair Chemical DB specs with a fire-rated or code-compliant building from US Hazmat Rentals when quantities trigger those controls.
Flammable vs non-flammable within this class
Chemicals in this category (18)
Mapped from free-text hazard class values in Chemical DB. Always verify against the manufacturer SDS.
Flammable hazardFlammable Storage- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Phosphorus PentasulfideP₂S₅Flammable solids Category 1 Substances/mixtures which, in contact with water, emit flammable gasesFlammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
Non-flammableNon-Flammable Storage- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage
- Flammable hazardFlammable Storage