China’s test of a Non-Nuclear Hydrogen Bomb (NNHB) on April 20, 2025, marks a significant shift in global deterrence dynamics. Using magnesium hydride, this high-energy weapon delivers massive destruction without nuclear fallout. It challenges traditional arms control frameworks and signals China’s push for advanced, non-nuclear strategic capabilities. This development warrants urgent international attention given its dual-use nature and potential for deployment in regional flashpoints like Taiwan or Tibet.
BY BRIG (DR) VIVEK VERMA (RETD)
FOR NEWS ANALYTICS
a 5 mins read.
TESTING OF A NON-NUCLEAR HYDROGEN BOMB BY CHINA
The dastardly carnage of Pahalgam perpetrated by the Pakistan-sponsored terrorists on 22 April 2025 has consumed the Indians and the Indian state, on the need to retaliate. The analysts have been busy analysing India’s successful conduct of Operation Sindoor targeting the terrorists’ location inside Pakistan and its successful handling of the escalation matrix. However, amidst the din, the security planners have failed to analyse an important technological demonstration by China on 20 April 2025 – the testing of an NNHB.
The 705 Research Institute of China State Shipbuilding Corporation (CSSC), a key player in underwater weapon systems, carried out this test using magnesium hydride, which is a high-density hydrogen carrier that can store up to 7.6% hydrogen by weight. It was originally developed to bring the gas to off-grid areas, where it could power hydrogen fuel cells for clean electricity and heat.
Magnesium hydride is a versatile compound that has multiple applications across energy, defence and space and the aerospace industries. Hence, a pilot project for producing 150 tons of magnesium hydride per year was initiated by the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences under Professors CHEN Ping and CAO Hujun. DICP is collaborating with the Yulin Innovation Institute of Clean Energy and Dalian Funde Jinyu Clean Energy Co., Ltd.
On 10 January 2025, it completed its first trial run, yielding qualified products from a single feedstock input. The project aims to fulfil China’s quest to find alternative clean energy resources for high-energy batteries while simultaneously exploring its military applications for creating thermobaric and incendiary weapons, rocket propellants, and thermal energy storage capabilities on spacecraft, as it can absorb and release heat efficiently, thereby making it useful for temperature regulation in spacecraft. The 20 April 2025 test of the NNHB triggers the possibility of capability development in the non-nuclear deterrence arena.
OVERVIEW OF NNHB
A NNHB is an explosive device that uses magnesium hydride for a sustained, powerful, non-nuclear explosion, unlike nuclear fusion or fission devices. The ability of magnesium hydride as a solid-state hydrogen storage material capable of generating immense energy enables the creation of a sustained fireball. Triggered conventionally, magnesium hydride fractures into microparticles, releasing hydrogen that ignites with air in a self-sustaining loop, forming a fireball lasting 15 times longer than TNT and generating temperatures exceeding 1000°C.
Unlike nuclear bombs, this device does not produce radioactive fallout. It is capable of melting aluminium alloys and allows precise targeting and large-area saturation strike with intense heat. This bomb adds to the non-nuclear deterrence arsenal and adds to the complex range of the escalation matrix. However, manufacturing magnesium hydride is both complex and dangerous, as the material is highly reactive and even brief exposure to air can cause fatal explosions. Production is currently limited to just “a few grams per day” due to the extreme conditions required.
The NNHB creates a sustained fireball using magnesium hydride, capable of high-temperature devastation without radiation, enhancing China’s arsenal for precision and saturation strikes.
WHAT ARE ITS POTENTIAL APPLICATIONS?
Few analysts refer to it as a Chinese weapon designed to be employed in a Taiwan contingency scenario, aiming to take out Taiwan’s maze of tunnels and underground storage using precision targeting and area saturation. However, its application in a Tibetan contingency cannot be ruled out, as multimodal delivery means are available. A two-kilogram NNHB, which has been tested, can be precisely delivered using drones, missiles, fighter jets, or bombers. It can be integrated into submarine-launched missile systems for underwater warfare and can create challenges for Freedom of Navigation Operations (FONOPS) in the South China and East China Seas.
The challenges of adapting it to ground-based systems, such as artillery and Rocket Launchers, remain due to metallurgical constraints in the current systems. However, developing systems as a replacement for Tactical nuclear weapons (TNW) cannot be ruled out.
NEW DETERRENCE DYNAMICS
The evolution of non-nuclear strategic weapons is reshaping global military dynamics. Nations are increasingly investing in advanced conventional weapons that can achieve strategic effects without crossing the nuclear threshold. The US tested its Mother of All Bombs (MoAB), officially known as the GBU-43/B Massive Ordnance Air Blast Bomb, in Afghanistan’s Nangarhar Province against ISIS-K (Islamic State – Khorasan Province) tunnel systems on 13 April 2017. MoAB, weighing 9800 kilograms and having 11 times the power of TNT and the ability to saturate an area of 1.6 kilometres, was dropped by Lockheed Martin C-130 aircraft.
The Russians designed the Father of All Bombs (FoAB), officially known as the Aviation Thermobaric Bomb of Increased Power (ATBIP), which weighs around 7,100 kilograms, with the temperature at the blast centre almost two times the MoAB. Tested in 2007, there is no confirmation about the employment of FoAB in the ongoing Russo-Ukrainian conflict. The analysis of payload and impact assessment of NNHB reveals that it is a game-changer and paves the way for multi-modal delivery means development.
These non-nuclear arsenals, packed with precision and lethality, lower the threshold of employment as they allow operational freedom of action. No presidential approvals are required for firing the MoAB. Similarly, there are no UN conventions that ban the use of these systems. These nations justify their possession as a means of deterrence and technology demonstration in high-energy warfare. These bombs allow nations to achieve strategic destruction without violating nuclear arms treaties. The development of hypersonics and directed energy weapons is intended to maintain strategic equilibrium.
However, the miniaturisation of arsenals may result in the development of artillery and rocket ground weapon systems, and the employment of these NNHB in tactical battlefield scenarios is likely to create strategic instability.
With multimodal delivery systems and potential battlefield use, NNHBs could destabilise existing deterrence structures, bypass arms treaties, and escalate tactical conflicts without nuclear thresholds.
NEED FOR THE UN TO STEP IN
UN Arms Control Agreements that focus on nuclear, chemical, and biological weapons do not explicitly ban thermobaric bombs. The use of such highly lethal thermobaric weapons in urban warfare grossly violates humanitarian principles. While MoAB, FoAB, and NNHB are not banned, their use in civilian areas or indiscriminate attacks could violate international humanitarian law. The concern regarding NNHB is far more as its usage in the energy sector can be used as an alibi for mass production. Hence, the United Nations Convention on Certain Conventional Weapons (CCW), which regulates weapons causing excessive suffering or indiscriminate destruction, must wake up to this new reality.
(Brig (Dr) Vivek Verma (Retd) was the former Deputy Director of Indian Army Think Tank CLAWS, New Delhi, and a former Senior Research Fellow at India’s oldest Defence Think Tank, USI of India, Delhi. He has also authored the book ‘Non-Contact Warfare: An Appraisal of China’s Military Capabilities’. The views expressed are of the author and do not necessarily reflect the views of The News Analytics Journal.)
Major Highlights:
- NNHB gives China strong non-nuclear deterrence, reshaping strategy without violating treaties.
- Magnesium hydride in NNHBs produces intense heat, causing lasting damage without radiation.
- Its clean energy appeal complicates oversight, easing mass production via civilian programs.
- NNHBs are deployable by drones, missiles, submarines, or jets, enhancing strategic flexibility.
- Current UN arms treaties exclude NNHBs, prompting concerns over unchecked, inhumane proliferation.
