Magnasite-nitron tablet
Magnasite-nitron tablets were an item of 23rd century survival gear sometimes found in medical kits. They were small, white, round tablets containing compressed chemicals. Placed on a hard surface and struck with moderate force, they would ignite, burning with a thin flame. Such a flame was chiefly useful as a light source in darkened areas – it was too small to be an effective heat source. Their small size made them more useful than a portable light in some situations.

In 2267, while fleeing Capellan pursuers on Capella IV, Kirk, Spock, and Leonard McCoy used such a tablet to illuminate their cave refuge, making McCoy's obstetrics task easier and safer. ()
Chemical compounds
Tools