Type a GC column and see its phase chemistry and every cross-vendor equivalent — your DB-5 ≈ Rtx-5 ≈ HP-5 ≈ ZB-5. Or browse by polarity / application.
Advisory & approximate. "Equivalent" phases share chemistry but differ in bleed, inertness and exact selectivity — treat as nearest match, confirm against the column certificate. Reference facts compiled from public vendor catalogs; no endorsement implied. © MAI-Alchemy.