Daily brief · Porter Square, Cambridge, MA
MIT chemistry building closed after toxin spill
August 30, 2026
Top story
MIT chemistry building remains closed after toxin spill
MIT's Camille Edouard Dreyfus Chemistry Building at 21 Ames Street, also known as Building 18, remains closed at least through Sunday while crews work to confirm it has been decontaminated after a Wednesday night spill involving dimethyl mercury, an extremely potent neurotoxin.
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