Catalyst
The closest matches to Catalyst in the Osmagora library are Roccobarocco (Rocco Barocco) · Chloé (Parfums Chloé) (Chloé) · Zen Original (Shiseido), ranked by how much of its note profile they share. See them side by side →
What smells like Catalyst?
These fragrances genuinely share the character of Catalyst by Halston, a floral scent, ranked by how much of its note profile they have in common. Not cheaper copies; scents in the same spirit.
Osmagora compares the full note profile of Catalyst, its top, heart and base notes, against every fragrance in the library, and ranks them by how much they genuinely share. The figure shown is that note overlap, kept deliberately conservative. These are scents in the same spirit, not cheaper copies or marketing lookalikes. Where nothing clears our bar, we say so plainly rather than dress a weak match as a strong one.