GCF-5

GCF-5 is the name given to a chemical weapon used by the UVSC. When deployed, GCF-5 is a bright red gas, hence the human nickname for it, "Agent Red". GCF-5 is extremely acidic and can eat through many filters. It also flames up if it comes into contact with water, adding another layer of danger.

Effects
When inhaled, GCF-5 causes severe chemical burns throughout the entire respiratory system, often causing the affected to cough up blood or choke. If GCF-5 comes into contact with open skin, it eats through it.

GCF-5 exposure is almost always lethal, an atmospheric concentration of 1,000 parts per million is enough to kill a human. There is no known treatment for nonlethal GCF-5 poisoning.

Chemical properties
The formula for GCF-5 is top-secret, the only thing known is that it is a fluorine compound. At room temperature, GCF-5 is a soft solid with the consistency of butter. It melts at 50-100 degrees Celsius, and evaporates at 120-150 degrees.

GCF-5 is typically stored in gold-plated barrels. Gold is one of the very few metals that GCF-5 does not eat through, instead creating an unreactive layer of gold(V) fluoride (AuF5).

History and Usage
GCF-5 was first used in the Battle of Lower Rehon during the American-Viechtyren War. It was absolutely devastating, responsible for killing 65% of the American troops during that battle, who were defending from the bottom of a hill.

One of the American survivors wrote, "A blood-red cloud swept down the hill, enveloping us in its wrath. I could barely breathe, and every breath I managed to take was worse than torture, and every breath more damaging than the last. It burned through my lips so I didn't have the luxury of keeping my mouth shut. The red mist blocked out all sight except for masked Viechtyren storming our position. I can't tell if I was one of the lucky ones, or unlucky ones."

GCF-5 is used extremely rarely, usually as a last resort. A GCF-5 attack has to go high up the chain of command to get approval.

The Arkhir battleship Valiant Star was another victim of GCF-5. UVSC commandoes from Battalion N implanted canisters of the gas into the ship's argon generation systems, effectively turning the entire ship into a gas chamber.