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VX
Photo: Government employee/contractor in offical performance of public duties. · Wikimedia Commons · Public domain
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VX

Nerve Agents & Delivery Systems · United Kingdom · 1952
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VX

VX
VX Photo: Government employee/contractor in offical performance of public duties. · Wikimedia Commons · Public domain
* Absolute score — assessed within category · no era adjustment
Lethality / Toxicity
95
Persistence
85
Onset Speed
70
Dissemination Effectiveness
80
Stability / Storage
88
Protection Difficulty
90
Detection Difficulty
75
Weaponization
92
Technology
80
Deterrence Value
95
Origin United Kingdom
CategoryNerve Agents & Delivery Systems
EraEarly Cold War
In service1952
Operators3 countries
Data Quality86%
86
Nerve Agents & Delivery Systems MASS Rating
1/1
Early Cold War
2/11
All-Time
Nerve Agents & Delivery Systems · 10 axes scored
Lethality / Toxicity
95
Persistence
85
Onset Speed
70
Dissemination Effectiveness
80
Stability / Storage
88
Protection Difficulty
90
Detection Difficulty
75
Weaponization
92
Technology
80
Deterrence Value
95
ⓘ Regardless of era, the same scoring system applies to all units in the nerve agents & delivery systems category.
01 / Overview
VX
Production
1952–
Operators
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
NERVE AGENTS & DELIVERY SYSTEMS · EARLY COLD WAR
1
PERFORMANCE/PRICE
35
UNIT COST (2025 USD)
—
86
nerve agents & delivery systems category
ⓘ Performance/Price and MASS score are computed across all units in the nerve agents & delivery systems category, regardless of era.
02 / Specs & Design
◎General6MOD.6
  • CBRN TypeNerve agent
  • CategoryChemical weapon
  • First Developed1952
  • Physical StateColorless, odorless liquid (oil)
  • Treaty Status (CWC/BWC)Banned under the Chemical Weapons Convention
  • In ServiceNo
◈Agent Properties7MOD.7
  • Agent ClassOrganophosphate
  • PersistencePersistent (low volatility, can remain on surfaces for weeks)
  • Toxicity / LethalityExtremely high (LD50 ~10 mg via skin exposure)
  • Onset TimeRapid (seconds to minutes)
  • Route of ExposureSkin contact, inhalation
  • LethalYes
  • IncapacitatingNo
▣Delivery4MOD.4
  • Delivery MethodAerosol spray, artillery shells, missiles, landmines
  • DisseminationVapor and droplets
  • Area CoverageDepends on delivery; can contaminate areas of several hundred meters
  • WeaponizedYes
◇Detection & Protection3MOD.3
  • Detection MethodGas chromatography, mass spectrometry, colorimetric detector kits
  • Protection LevelFull protective suit and gas mask
  • Decontamination MethodDecontamination with sodium hypochlorite (bleach) or specialized decontamination agents
◆Production1MOD.1
03 / History
SERVICE LIFESPANStill in Service
  1. 1952Production started
74
years in service
2
countries operating
ⓘ The producing country no longer actively operates it. 1 countries retired it.
04 / Operators
📖 TERMS ON THIS PAGE3terms
Lethal refers to the capability of a nerve agent or delivery system to cause death in targeted organisms, typically humans, upon exposure or impact.
Designation for chemical or biological agents adapted for use as weapons, including delivery systems engineered for dissemination.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources
📖 ENCYCLOPEDIA Browse the Nerve Agents & Delivery Systems entry →