Flammable Solid (Class 4.1) Storage

Class, Division, and GHS meaning

DOT Class 4.1 covers flammable solids. GHS Category 1–2 flammable-solid phrases communicate ease of ignition; they still inform storage as flammable merchandise.

Storage implications for rental buildings

Store away from oxidizers and strong ignition sources. Prefer fire-rated chemical buildings when quantities and local fire code require it, and keep packaging dry and intact.

Flammable vs non-flammable within this class

• Flammable storage materials (2 in this class)
• Non-flammable storage materials (1 in this class)

Chemicals in this category (3)

Mapped from free-text hazard class values in Chemical DB. Always verify against the manufacturer SDS.

• NaphthaleneC10H8Flammable solids Category 2
  

  Non-flammableNon-Flammable Storage
• ParaformaldehydeOH(CH2O)nH(n=8-100)Category 2 Flammable Solids
  

  Flammable hazardFlammable Storage
• SulfurS8Flammable Solid - Category 2
  

  Flammable hazardFlammable Storage