The Chemical Thrower can be highly effective, especially after its range has been upgraded at a Power to the People station. I never really used the Liquid Nitrogen ammunition much, but spraying liberal amounts of Napalm or Electric Gel can get you out of a pinch fast. Just make sure you keep it fully loaded when out of combat as having to reload your chemical of choice during a battle can prove lethal.
Your first opportunity to pick up this weapon is from Langford's desk in Arcadia.
Ammunition
Napalm
Napalm is particularly effective against targets vulnerable to fire, and will set things on fire if continuously applied.
This ammunition has a carry capacity of 400 and a load capacity of 100.
Liquid Nitrogen
Liquid Nitrogen is particularly effective against targets vunlerable to cold, and will freeze creatures if continuously applied.
This ammunition has a carry capacity of 200 and a load capacity of 100.
Electric Gel
Electric Gel deals electricity damage to targets, and may send them into shocked convulsions. It is also good for temporarily disabling machines.
This ammunition has a carry capacity of 200 and a load capacity of 100.
Upgrades
Chemical Thrower Consumption Rate
A tapered nozzle reduces the ammunition consumption rate of the Chemical Thrower. If you use the Chemical Thrower often, grab this upgrade after taking the range upgrade below.
Chemical Thrower Range
A pressure-calibrated hose increases the range of the Chemical Thrower. A must-have upgrade if you spend a lot of time wielding the Chemical Thrower.