VX gas
E91072
VX gas is an extremely toxic, persistent nerve agent developed for chemical warfare, known for its rapid disruption of the nervous system even at very low exposure levels.
All labels observed (5)
| Label | Occurrences |
|---|---|
| VX | 1 |
| VX (nerve agent) | 1 |
| VX gas canonical | 1 |
| VX nerve agent | 1 |
| nerve agent VX | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T773455 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: VX gas Context triple: [The Rock, featuresWeapon, VX gas]
-
A.
Zyklon B
Zyklon B was a cyanide-based pesticide infamously used by Nazi Germany as a chemical agent for mass murder in extermination camps during the Holocaust.
-
B.
Agent Orange
Agent Orange is a powerful herbicidal chemical mixture used by the U.S. military as a defoliant, notorious for causing severe health problems and environmental damage.
-
C.
T-Stoff (high-test hydrogen peroxide)
T-Stoff (high-test hydrogen peroxide) was a highly concentrated, volatile oxidizer used as rocket propellant in German World War II aircraft and missiles, notably the Messerschmitt Me 163.
-
D.
Brimstone missile
The Brimstone missile is a British air-launched, precision-guided anti-armor and multi-role strike weapon designed for high accuracy against moving and static targets with minimal collateral damage.
-
E.
SIVA chemical factory
SIVA chemical factory was an Italian industrial plant where writer and chemist Primo Levi worked as a chemist after surviving World War II.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: VX gas Target entity description: VX gas is an extremely toxic, persistent nerve agent developed for chemical warfare, known for its rapid disruption of the nervous system even at very low exposure levels.
-
A.
Zyklon B
Zyklon B was a cyanide-based pesticide infamously used by Nazi Germany as a chemical agent for mass murder in extermination camps during the Holocaust.
-
B.
Agent Orange
Agent Orange is a powerful herbicidal chemical mixture used by the U.S. military as a defoliant, notorious for causing severe health problems and environmental damage.
-
C.
T-Stoff (high-test hydrogen peroxide)
T-Stoff (high-test hydrogen peroxide) was a highly concentrated, volatile oxidizer used as rocket propellant in German World War II aircraft and missiles, notably the Messerschmitt Me 163.
-
D.
Brimstone missile
The Brimstone missile is a British air-launched, precision-guided anti-armor and multi-role strike weapon designed for high accuracy against moving and static targets with minimal collateral damage.
-
E.
SIVA chemical factory
SIVA chemical factory was an Italian industrial plant where writer and chemist Primo Levi worked as a chemist after surviving World War II.
- F. None of above. chosen
Statements (57)
| Predicate | Object |
|---|---|
| instanceOf |
Schedule 1 chemical
ⓘ
chemical warfare agent ⓘ nerve agent ⓘ organophosphorus compound ⓘ |
| allowedUse | research under strict control ⓘ |
| antidote |
atropine
ⓘ
diazepam ⓘ pralidoxime ⓘ |
| belongsToClass | V-series nerve agents ⓘ |
| boilingPoint | 298 °C ⓘ |
| chemicalFormula | C11H26NO2PS ⓘ |
| color | amber ⓘ |
| countryDestroyedStockpiles |
Russia
ⓘ
United States of America ⓘ
surface form:
United States
|
| decontaminationMethod |
oxidizing agents such as hypochlorite
ⓘ
strong alkaline hydrolysis ⓘ |
| developedFor | chemical warfare ⓘ |
| developedInCountry | United Kingdom ⓘ |
| discoveredBy |
J. F. Newman
ⓘ
Ranajit Ghosh ⓘ |
| discoveredIn | 1952 ⓘ |
| effectOnBody |
accumulation of acetylcholine at synapses
ⓘ
disruption of nervous system signaling ⓘ |
| environmentalPersistence | days to weeks on surfaces ⓘ |
| hasOtherName |
Amiton analog
ⓘ
VX nerve agent ⓘ ethyl methylphosphonothioic acid S-[2-(diisopropylamino)ethyl] ester ⓘ |
| hydrolysisProduct | less toxic phosphonic acids ⓘ |
| IUPACName | O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothioate ⓘ |
| laterWeaponizedBy |
United States of America
ⓘ
surface form:
United States
|
| LCt50InhalationHumanEstimate | about 30–50 mg·min/m³ ⓘ |
| LD50DermalHumanEstimate | about 10 mg ⓘ |
| mechanismOfAction | acetylcholinesterase inhibition ⓘ |
| meltingPoint | −51 °C ⓘ |
| notableIncident | assassination of Kim Jong-nam in 2017 ⓘ |
| odor | virtually odorless ⓘ |
| onsetOfSymptoms | seconds to minutes after exposure ⓘ |
| persistence | high ⓘ |
| physicalStateAtRoomTemperature | liquid ⓘ |
| primaryCauseOfDeath | respiratory arrest ⓘ |
| prohibitedUse | warfare ⓘ |
| regulatedBy | Chemical Weapons Convention ⓘ |
| routeOfExposure |
dermal absorption
ⓘ
ingestion ⓘ inhalation ⓘ ocular exposure ⓘ |
| solubilityInOrganicSolvents | high ⓘ |
| solubilityInWater | slightly soluble ⓘ |
| storageForm | binary or unitary munitions ⓘ |
| symptom |
bronchoconstriction
ⓘ
convulsions ⓘ excessive salivation ⓘ miosis ⓘ muscle twitching ⓘ respiratory failure ⓘ |
| toxicity | extremely high ⓘ |
| volatility | very low ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: VX gas Description of subject: VX gas is an extremely toxic, persistent nerve agent developed for chemical warfare, known for its rapid disruption of the nervous system even at very low exposure levels.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
The Rock
this entity surface form:
VX (nerve agent)
this entity surface form:
nerve agent VX
this entity surface form:
VX
this entity surface form:
VX nerve agent