|For an overview of all grenades, see Hand grenade.|
For an overview of other chemical and gas grenades, see Chemical and gas grenades.
|The following is based on Fallout Tactics and is not canon.|
It is quite potent in the early stages of the game when used against raiders and beastlords. However, it's not quite as useful against supermutants and especially robots. Low availability coupled with early access also contributes towards making this an early-game weapon.
Incendiary grenades have a default ammo variant of 'Flame', which means they're more effective against unarmored targets.