Help Identify Unknown

Using the options on the left, identify an unknown chemical by selecting criteria from any combination of the following:
  • Physical properties of the substance
  • Signs/symptoms from exposure to the substance
  • NFPA 704 full or partial placard values
  • Substance categories (flammable, meth lab, etc.)
  • Transport identification: DOT placard and/or type of rail car or road trailer)

Counts displayed after the criteria options indicate the size of the results list if that option is selected.

Substances not matching ALL selections are eliminated; click Results to see a list of the remaining substances.

Click Start Over to clear all selections.
Results Count
438 of 438