Ultra-pure water sounds harmless… but at Super-Kamiokande, it’s dangerous 💧⚠️ The Super-Kamiokande neutrino detector in Japan holds 50,000 tons of ultra-pure water—so pure it’s actually chemically aggressive. Here’s why 👇 Normal water contains dissolved ions (like calcium, sodium, and magnesium). Ultra-pure water has almost none. That makes it unstable: it wants to dissolve anything it touches to regain balance. In Super-K, this means the water can: • Leach metals from pipes and containers • Corrode surfaces more easily than regular water • Damage human tissue if exposed for long periods (it pulls ions from your skin and eyes) So why use it at all? Because purity is everything for neutrino physics. When a neutrino hits a water molecule, it creates a faint flash of Cherenkov radiation. Any impurities would scatter light, add background noise, or mimic false signals. Ultra-pure water gives scientists a crystal-clear medium to detect some of the most elusive particles in the un...