Acetone at War: How Fermentation Solved a Cordite Shortage

In this episode, Chemistry World explores how the solvent acetone, essential for cordite propellants used by the Royal Navy in World War I, became a critical bottleneck. A Manchester professor and a battalion of Clostridium acetobutylicum bacteria revolutionized acetone production, stabilizing munitions manufacture and keeping the fleet operational. The story weaves together chemistry, industry, and politics, tracing how a wartime breakthrough blossomed into lasting scientific and economic impact.

• WWI munitions depended on acetone for cordite; shortages threatened naval readiness.
• Chaim Weizmann and his bacterial fermentation produced acetone efficiently, optimizing cordite mixtures.
• The breakthrough intersected with politics, influencing leaders and producing lasting connections to modern Israel.
• Acetone remains a key industrial solvent with broad uses in polymers and pharmaceuticals.

Overview and historical context

The podcast examines a pivotal moment in early 20th century chemistry when acetone, a simple organic solvent, was essential for the Navy’s cordite propellant used in artillery. On the morning of 1 June 1916, a sailor’s body washed ashore during the Battle of Jutland, underscoring the real-world stakes of chemical supply chains in wartime. The discussion situates acetone not as a standalone chemical, but as a bottleneck in a complex munitions ecosystem that also included nitrocellulose and nitroglycerine in cordite formulations.

The bottleneck and the wartime solution

The standard production route for acetone at the time could not meet demand for cordite. The Navy required a reliable and scalable acetone supply, while the RDB (Research Department) variant demanded different proportions than fleet artillery. The shortage risked a national security crisis, prompting serious research into alternative production methods.

The Weizmann fermentation breakthrough

Enter a chemistry professor from Manchester, often referred to as Chaim Weizmann in historical accounts, and his Clostridium acetobutylicum bacterial system. By fermenting starch, these bacteria produced acetone in quantities sufficient to optimize the cordite formulation. The triumph reportedly pleased key government figures and industry leaders, including David Lloyd George and Winston Churchill, helping to stabilize munitions supply and contribute to strategic war aims.

Context, culture, and the lasting legacy

The narrative connects the science to broader political and cultural impacts. It’s been claimed, though disputed by Weizmann, that the Balfour Declaration—founding Israel and recognizing Weizmann’s leadership—was a political reward for wartime scientific contributions. The podcast also touches on the diverse roles of acetone beyond weaponry, including its metabolism in humans and its potential as a disaster marker in modern forensic science.

Acetone today and final reflections

In contemporary industry, acetone remains widely used in nail polish removers, paints, and pharmaceuticals, thanks to its relatively low toxicity and favorable solvent properties. The host connects the WWI story to modern chemistry, noting how two seemingly unrelated products—petrochemical feedstocks and acetone production—emerge together in large-scale manufacturing processes. The discussion closes by pointing to future applications, such as acetone as a biomarker for disease or disaster response, underscoring the molecule’s enduring relevance.