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The chemistry behind Garden Grove’s runaway chemical tank

Ellsworth Toohey
Jun 02, 2026
∙ Paid

Alireza_yadegari24/shutterstock.com

Over the long weekend, a storage tank of methyl methacrylate in Garden Grove, California, started to warm up — and as the chemist Derek Lowe lays out in a post on the chemistry of the saga, a warming MMA tank is exactly the wrong thing to see. The stuff wants to turn into plastic, and the reaction that does it gives of…

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