The density of dibenzalacetone is 1.1ﾱ0.1 g/ml when it is a liquid. As a solid, the density of the molecule varies depending on its form. Since dibenzalacetone is soluble in organic solvents, its concentration is often reported in molarity rather than as a density.
Dibenzalacetone has a melting point of around 111 degrees Celsius, so it is a solid at room temperature and has variable density in this state. While its solid crystals have a slightly higher density than the liquid form, these crystals are typically very small, and so bulk volumes of dibenzalacetone crystals or powder have a density that is either lower than or similar to the liquid density, depending on the degree of compaction.