Hazardous Material

Hazardous Material is a miscellaneous quest in Fallout 4.

Detailed walkthrough
Fred Allen will ask the player character to retrieve a HalluciGen gas canister from HalluciGen, Inc. The building is inhabited by Gunners and the gas canister can be found in the basement. The Sole Survivor can persuade Fred to give more than the original 200 caps for the work, the payment amount can be raised to 250, 300, or, with intimidation, 400 caps.

Bugs
After retrieving the gas canister, the quest marker may be fixed on the player character in the Pip-Boy map and invisible on the compass, and Fred will not have the relevant dialogue choice in order to complete the quest. This can be circumvented by using the console command. The player character will still receive the correct amount of XP and caps after doing so.