As harrowing new investigations point to the suspected use of chemical weapons in Sudan, international monitors are once again running into a familiar, paralyzing roadblock—data secrecy.
Imagine a team of international inspectors standing in the rubble of a recently bombarded industrial district and carefully swabbing the concrete for invisible residues. Hours later, back at a secure laboratory, their portable mass spectrometers spit out a complex graph of peaks and valleys. This graph is a chemical fingerprint of a potent toxin. It shows trace impurities that could reveal exactly where this deadly agent was manufactured and who bought the raw materials.
But there is a glaring problem.
The inspectors plug the data into their system and get no match. The exact synthetic route that produced this weapon is a known entity, but that knowledge is locked inside a classified database halfway across the world, guarded by an allied government that refuses to share its proprietary intelligence. The perpetrators evade detection simply because the nations tasked with holding them accountable refuse to pool their knowledge.
This scenario captures the fundamental crisis at the heart of modern arms control. We can call it the secrecy paradox. Nations desperately want a robust international system capable of attributing chemical attacks to terrorists or rogue regimes. Yet those same nations are paralyzed by the fear of revealing their own defense research or commercial trade secrets.
The global chemical weapon watchdog, the Organisation for the Prohibition of Chemical Weapons, or OPCW, recently confronted this exact dilemma. Its scientific advisory board’s comprehensive report on chemical forensics (PDF) made one issue abundantly clear—the era of merely counting artillery shells in massive bunkers is over. All declared global stockpiles have been destroyed. The new frontier is chemical forensics, and the ultimate tool in this frontier is a centralized global database of chemical signatures. But building this database requires sovereign states to hand over highly sensitive spectral data. So far, they are hesitant to do so.
National governments argue that sharing the spectral data of novel chemical agents or complex precursors could inadvertently provide a cookbook for adversaries. They worry about industrial espionage. If a nation with a massive pharmaceutical industry uploads its vast library of synthetic pathways to an international server, it fears that hostile intelligence agencies might breach it. Consequently, governments hoard their chemical data, preferring to operate in strict silos.
But this instinct to hoard information is deeply flawed and ultimately self-defeating. When inspectors face a complex mixture of degraded chemicals in a war zone, they need a comprehensive reference library to compare their environmental samples against. Without it, attribution becomes a guessing game. By trying to protect their national security through absolute secrecy, these nations are actually creating a massive blind spot that hostile actors can easily exploit.
Furthermore, the emergence of artificial intelligence in forensic science (PDF) makes this data starvation even more critical.
Forensic chemists are increasingly relying on machine learning models to predict how a specific nerve agent will degrade over time when exposed to sunlight or soil. These algorithms can theoretically take a sample of degraded dirt and calculate exactly what chemical was spilled there weeks ago. But algorithms are useless without massive amounts of training data. If governments refuse to feed their proprietary-chemical degradation studies into a shared international pool, these advanced predictive models will remain completely blind and ineffective in the field.
To understand the immense power of shared chemical intelligence, we need only to look at the investigations into the use of sarin gas in Syria (PDF) over the last decade. When inspectors analyzed samples collected from attack sites, they looked not only for sarin but also for the chemical breadcrumbs left behind during the manufacturing process. They found specific impurities like hexamine, which was used as an acid scavenger. Because international watchdogs had access to the specific chemical recipes used by the Assad regime, they could draw a direct line between the rubble in the streets and the regime’s laboratories.
If the chemical signatures of those precursors and scavengers had been kept in the dark, the attribution would have been entirely circumstantial. The scientific certainty that rallied the international community was possible only because investigators had access to the right baseline data. When we scale this up to the thousands of potential toxic industrial chemicals and novel nerve agents floating around the black market today, the need for a global repository becomes undeniable.
The global chemistry enterprise should also be on board to dismantle data silos and share precursor intelligence. In doing so, chemists can become the frontline barrier against the weaponization of modern science.
Critics of a global chemical database often claim that multilateral organizations simply cannot be trusted to secure such volatile information. Yet history proves otherwise. The nuclear nonproliferation regime has managed a nearly identical balancing act for decades.
The International Atomic Energy Agency routinely handles sensitive scientific data using compartmentalized security protocols, anonymized data, and isolated secure networks.
There is no technical reason why the regime of chemical weapon verification cannot adopt a similar framework. We now have access to advanced cryptographic techniques. Concepts like zero-knowledge proofs allow an investigator to verify that a chemical sample matches a specific signature in a database without ever actually seeing the underlying classified data.
Credit:
Courtesy of Abdul Rehman
The technology to protect sovereign secrets while still allowing for international verification exists today. What is missing is the political courage to deploy it.
Abdul Rehman is a research officer at the Center for International Strategic Studies AJK, specializing in the Chemical Weapons Convention, nonproliferation regimes, and weapons of mass destruction.
Views expressed are those of the author and not necessarily those of C&EN or ACS.
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