Pym Particles

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Pym Particles is a substance that features in Marvel Comics.



Pym Particles was a formula that allowed one to alter the size of an object and had been developed by Hank Pym. Following decades of corporate work, a frustrated Hank quit working for his employer in order to make use of his long suppressed creative side. He then began work on his creative side with him experimenting on matter compression reduction agents leading to him accidently shrinking himself. The experience led to him naming the agent Pym Particles and he used them to become the superhero Ant-Man. (Age of Ultron v1 #10AI)

Alongside Bill Foster, Pym worked with creation of a variant of the particle to help enlarge food to solve world hunger issues. This resulted in Project: B.I.G. (Biotechnically Induced Growth) that were a derivative of the Pym Particles. (Avengers v1 #379)

The particles were used as part of the Big House prison that kept prisoners in a shrunken state. The Mad Thinker orchestrated an escape plot that involved the shrunken prisoners stealing Pym Particles in order to restore themselves to their full size. (She-Hulk v1 #5)

After World War Hulk, Tom Foster snuck into the sub-basement of Avengers Mansion in order to use the laboratory's third-generation nano-particle acceleration unit. This allowed him to crack the growth formula for Pym Particles which he used to increase his size as he took on the identity of Goliath where he sought to get revenge against Tony Stark for the perceive death of his uncle Bill Foster. (World War Hulk: After Smash v1 #1)

'Hank Pym' later produced a new version of the growth formula that was a vast improvement over the original allowing the user to shift between shrinking to growing to massive size. He offered this to his ex-wife Janet van Dyne for her to use as the Wasp. During the Symbiote attack on New York, Janet used the formula to turn herself into giant size in order to contain the infestation in the city. However, she came to be taken over by the parasites leading to her transformation into a giant Symbiote that attacked the Mighty Avengers. She was returned back to normal with the other people of New York when Iron Man produced an antidote that turned all the infected back to normal. (Mighty Avengers v1 #8)

Months ago, the Skrull named Criti Noll in the guise of Hank Pym had infected the Growth Formula of Janet van Dyne. During their invasion, they triggered their booby trap in an attempt to turn her into a living biological bomb designed to destroy her fellow superheroes. Thor managed to use his power to send her away seemingly killing the Wasp in order to save the rest of the planet's heroes. (Secret Invasion v1 #8) In reality, she was actually displaced into the Microverse where she had to escape from tyrant Lord Gouzar. She eventually managed to activate her old Avengers distress beacon and get a signal out. This saw a number of Avengers including Captain America, Iron Man, Thor and Hank Pym go into the Microverse to find her though they themselves faced opposition from Gouzar. Meanwhile, on Earth, Wonder Man came to learn of the missing Avengers and took a batch of new Pym Particles from Hank's lab which he used to shrink himself into the Micorverse to save his comrades in order to redeem himself. After they recovered Janet, they used the Pym Particles to return to Earth though Gouzar followed them where he was giant sized but was greeted by the combined Avengers who succeeded in defeating him. They then sent the warlord back into his sub-atomic realm and moved forward with celebrating the return of the Wasp. (Avengers v4 #34)

Hank Pym later adopted the superhero name of Wasp where he developed a new kind of Pym Particle that enlarged and shrank fissures in space-time thus creating Pym Pockets. These could be used to store his laboratory and to serve as a teleporter with Director Norman Osborn dedicating the resources of H.A.M.M.E.R. in apprehending this team of Mighty Avengers. To aid his efforts, he exhumed the corpse of Bill Foster in order to gain his clavicle so that his teams could study its unique form of Pym Particles in an effort to Hank Pym's base. They were able to track the location to a maintenance closet in a Chicago mall with H.A.M.M.E.R. agents attempting to take control of the site. In desperation, Jocasta cut the tether that linked them to Earth thus threatening to strand them outside of space-time. (Mighty Avengers v1 #24)

In the Red Room, the young Nadia managed to disassemble and re-assemble a black market Pym Particle which she used to escape the facility. She later sought out her biological father Hank Pym and took on the identity of the Wasp. (All-New All Different Avengers v1 #9)

An agribusiness corporation named Santomon conducted experiments in modified Pym Particles with honey bees. (Monsters Unleashed v3 #9)


It was a matter compression reductiom agent that shrank objects or people. (Age of Ultron v1 #10AI) The particles adjusted the Planck constant, the Higgs Field and the space between atoms whilst also shunting matter between the world and the Kosmos Dimension. This allowed theuser to bypass the Square-cube law of physics which normally resulted in objects that grew too large from collapsing in on their own weight. (Unbeatable Squirrel Girl v2 #14)

One could program a Pym Particle so long as one remembered the three axes of sizechange namely size, strength and density. (Ultimates v2 #3)

It gave off a form of radiation that allowed the wearer to shrink also emitted a faint signal but this disappeared quickly as the particle's signal had a short half-life. (Irredeemable Ant-Man v1 #3)

A version of the Particle was used to grow objects instead of shrinking them with being the Biotechnically Induced Growth (B.I.G.) particle. (Avengers v1 #379) Hank later developed a means of shrinking portions of space-time thus creating Pym Pockets that were small dimensions he could use for his laboratory and as a teleporter. He was able to tether his lab to distant fixed spots thus meaning that an ordinary door served as a portal between such locations. (Mighty Avengers v1 #21)


  • Hank Pym :
  • Janet van Dyne :
  • Clint Barton :
  • Bill Foster :
  • Scott Lang :
  • Cassie Lang :
  • Tom Foster : nephew of Bill Foster who resented the Pro-Registration forces in his uncle's death and after cracking the growth formula he took the identity of Goliath. (World War Hulk: After Smash v1 #1)
  • Nadia van Dyne :
  • Raz Malhotra :


  • Pym Particles were created by Stan Lee, Larry Lieber and Jack Kirby where they made their first appearance in Tales to Astonish v1 #27 (January, 1967).

Alternate Versions

In other media


  • In The Avengers: United They Stand, Pym Particles were referenced and shown in the animated television series with Hank Pym and Janet van Dyne as superheroes.
  • In Fantastic Four: World's Greatest Heroes, Pym Particles were mentioned in the episode "World's Tiniest Heroes" with Mister Fantastic gathering data on them for his study on the Microverse.
  • In The Avengers: Earth's Mightiest Heroes, Pym Particles made a number of appearances in the animated series. Their capabilities were detailed in the episode "To Steal an Ant-Man" where users could shrink yet maintain strength and speed levels relative to their full size allowing them to take down full size humans as well as being fast enough to keep up with them. Hank Pym was developing a new device called Pym Discs that could be launched at targets and applied Pym Particles to shrink them. He intended to use them as a non-violent means of securing supervillains though they were not stabilized at the time that could lead to the target shrinking to subatomic where they could shrink out of existence as they reduced into the Microverse. After stealing the Ant-Man suit, Scott Lang began to make use of the equipment and its supply of Pym Particles. Hank Pym hired the Heroes for Hire to help retrieve the Ant-Man Suit and built a Pym Particle detection device to track it down. In "Yellowjacket", Hank Pym had constructed a micro-prison but the Pym Particles holding it were unstable causing it to collapse into a singularity with the Avengers along with the Serpent Society trapped inside. Pym managed to re-enlarge everyone and restored them to full size before the prisons collapse killed them all.
  • In Avengers Assemble, Pym Particles made a number of appearances in the animated series. They were first shown in the episode "One Little Thing" where Iron Man called Ant-Man to assist him in disposing of unstable Pym Particles at Stark Tower. These were accidently released where they began shrinking or enlarging anything in the tower as well as disrupted Scott Lang's own abilities until they were all collected. Pym Particles were part of the plot line in the episode "Small Time Heroes". They were the means by which Scott Lang as the Ant-Man managed to shrink with it being said the particles gathered in the frontal lobe. Numerous Pym Particles were stolen by A.I.M. for M.O.D.O.K. who used them to grow hos withered body into a giant form as he decided he could not rely on his cybernetics due to Ultron. Ant-Man with the Avengers Iron Man, Thor and Hawkeye managed to remove the particles from inside M.O.D.O.K.s brain turning him back to his normal form.


  • In the Marvel Cinematic Universe, Pym Particles appeared in the shared continuity setting:
    • In Ant-Man, Pym Particles made an appearance in the setting of the live-action film. They were a formula that affected the relative distance between atoms that allowed the user to shrink in size. It was developed by Dr. Hank Pym who used them to power a suit where he operated as a government agent named Ant-Man. The United States government attempted to replicate the formula but failed. When Pym learnt of this, he quit his position and instead opened up a research firm named Pym Technologies. Pym former protégé Darren Cross later attempted and succeeded in replicating the formula to power his Yellowjacket suit.
    • In Ant-Man and the Wasp, Pym Particles appeared in the setting of the live-action sequel film.
    • In Avengers: Endgame, Pym Particles appeared in the setting of the live-action film.

Video games

  • In Marvel: Avengers Alliance, Pym Particles appeared in the settings of the Facebook video game. In "Special Operations - Enter Ant-Man", Hank Pym had discovered them and built his Ant-Man suit around them.
  • In Marvel Heroes, Pym Shrinking Particles appeared in the setting of the MMORPG video game.
  • In Marvel: Future Fight, Pym Particles were part of the equipment gear of Ant-Man Scott Lang that could be upgraded.
  • In Avengers Academy, Pym Particles appeared in the setting of the mobile video game.


  • Tales to Astonish v1:
  • Avengers v1:
  • She-Hulk v1:
  • Mighty Avengers v1:
  • Secret Invasion v1:
  • Avengers v4:
  • World War Hulk: After Smash v1:
  • Unbeatable Squirrel Girl v2:

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