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DMI ref. omg060     Image title: Dimedone | 9.48 Copyright 2006 David Malin Images Dimedone, Cyclomethone, 5,5-dimethyl-1,3-Cyclohexanedione (CSA# 126-81-8). MP. 147-150C (decomposes). Diketenes such as dimedone are important in th manufactuure of grochemicals, dyes, pigments, pharmaceuticals, vitamins as well as stabilizers for PVC and polyester. They are also used as components for fragrances. Crossed polars.