Custard powder is a kitchen staple used to make delicious desserts, but few people realize it has a hidden danger—it can be highly explosive under certain conditions.
This shocking reality became clear on November 18, 1981, at the Bird’s Custard factory in Oxfordshire. A malfunction caused a hopper to overflow, releasing a cloud of cornstarch into the air. A small ignition source triggered an explosion, injuring nine workers. Although no lives were lost that day, history has seen far deadlier dust explosions. In 1871, a flour mill explosion in Minnesota killed 14 people, while a massive cornstarch explosion in 1919 claimed 44 lives in Cedar Rapids, Iowa.
The science behind these disasters is simple. Flammable powders like cornstarch, flour, sugar, coal dust, and even powdered plastic can become dangerous when airborne. Suspended in the air, these tiny particles have a massive surface area exposed to oxygen, making them highly flammable. If a spark or heat source ignites even a small portion, a chain reaction can occur, causing an explosion.
Factories take extensive measures to reduce the risk, such as grounding machinery to prevent static electricity, installing filtration systems, and ensuring proper ventilation. However, accidents still happen. A tragic example occurred in 2015 at a water park in Taiwan when colored cornstarch powder ignited during an event, injuring over 500 people and leading to 20 deaths.
Despite safety guidelines, many people are unaware of the risks. Some colored powders are even incorrectly labeled as non-flammable. The only way to prevent such disasters is through awareness and strict safety precautions.
While custard powder may seem harmless in the kitchen, it’s a reminder that even everyday substances can pose unexpected dangers. Understanding these risks and taking the right precautions can help prevent future tragedies.
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