I was checking memory alpha and was not able to determine the maximum range of a handheld 'type 2' phaser. What is the canon based answer regarding how far a class 2 hand phaser can be effectively used?
Quoting from the memory alpha article on phasers
The Star Fleet Technical Manual gives the effective ranges for different settings. On the type 1 phaser they were: stun - thirty meters, heat - two meters, disrupt - twenty meters, dematerialization - ten meters. On the type 2 phaser the ranges were: stun - ninety meters, heat - six meters, disrupt - sixty meters, dematerialization - thirty meters.