Germane

[Sarah]

Probably the most dangerous chemical in the world (worse than nitroglycerin) because it has a blue 4, red 4, and a yellow 3. (extremely flammable, fatal if swallowed or inhaled, serious reactivity.)

[Tina]

Relevant to a subject under consideration.

[Dave Paprocki]

Ideas or information that is germane to a particular subject or situation is connected with and important to it: