What is GA and GB?
Sarah Martinez
Updated on April 03, 2026
Summary: Nerve agents GA (tabun), GB (sarin), GD (soman), and VX are manufactured compounds. The G-type agents are clear, colorless, tasteless liquids miscible in water and most organic solvents. GB is odorless and is the most volatile nerve agent. GA has a slightly fruity odor, and GD has a slight camphor-like odor.
What are G nerve agents?
The organophosphate nerve agents tabun (GA), sarin (GB), soman (GD), and cyclosarin (GF) are among the most toxic chemical warfare agents known. Together they comprise the G-series nerve agents, thus named because German scientists first synthesized them, beginning with GA in 1936.
What are V type nerve agents?
V-Series nerve agents are organophosphate esters that are used as chemical weapons. They are extremely potent acetylcholinesterase inhibitors. Biological effects include seizures, salivation, lacrimation, urination, diaphoresis, diarrhea, vomiting, miosis, and muscles spasms.
When comparing G agents and VX agents which agent is more toxic and by how much?
Though liquid at normal temperatures, VX has the consistency of motor oil, and seldom presents a vapor hazard, unless exploded or subjected to high temperature. VX is much more toxic (100 to 150 times) than sarin when on the skin because sarin evaporates from the skin surface while VX does not.
Is cyanide a choking agent?
They are blood agents that interfere with the use of oxygen in the body. But cyanogen chloride has strong irritating and choking effects on the eyes and respiratory tract, unlike hydrogen cyanide. Liquid forms of cyanide will burn skin and eyes. Cyanide acts quickly, but only large amounts are deadly.
Is nerve gas lethal?
Some chemical agents are highly lethal. For example, nerve agents such as sarin, tabun, soman, and VX can kill almost instantly; a few droplets absorbed through the skin can paralyze and cause death in minutes.
Is V agent a nerve agent?
The V-series agents are part of the group of persistent agents, which are nerve agents that can remain on skin, clothes, and other surfaces for long periods of time due to low volatility characteristics. The consistency of these agents is similar to oil; thus, the inhalation hazard is less than with the G agents.
How long do nerve agents last?
Fatigue, irritability, nervousness, and memory defects may last for as long as 6 weeks after recovery from exposure. It is not known whether exposure to nerve agents causes cancer or reproductive effects in humans. Severely exposed people are not likely to survive.
Can you survive VX nerve agent?
Recovery from VX exposure is possible with treatment, but the antidotes available must be used quickly to be effective.
What does VX do to the body?
VX is a yellowish, odourless and tasteless liquid that disrupts the body’s nervous system to lethal effect. Ten milligrams is enough to kill a person through skin contact although it can also kill through inhalation. One of the women involved in the attack subsequently fell ill too.
What does sarin smell like?
Impure sarin can smell like mustard or burned rubber. Extremely lethal cholinergic agent.
What does phosgene gas smell like?
Phosgene gas may appear colorless or as a white to pale yellow cloud. At low concentrations, it has a pleasant odor of newly mown hay or green corn, but its odor may not be noticed by all people exposed. At high concentrations, the odor may be strong and unpleasant.