# 50% Diphenyl - 50% Dimethylpolysiloxane — GC column stationary phase cross-reference by manufacturer

For 50% Diphenyl - 50% Dimethylpolysiloxane, usp g-code(s) is G3; agilent equivalents is DB-17, HP-50, CP-Sil 24 CB; restek equivalents is Rtx-50; phenomenex equivalents is ZB-50; supelco/merck equivalents is SPB-50, verified against its source on 2026-08-15.

- **Phase chemistry:** 50% Diphenyl - 50% Dimethylpolysiloxane _(verified: appears in the quote below)_
- **USP G-code(s):** G3 _(verified: appears in the quote below)_
- **Agilent equivalents:** DB-17, HP-50, CP-Sil 24 CB _(verified: appears in the quote below)_
- **Restek equivalents:** Rtx-50 _(verified: appears in the quote below)_
- **Phenomenex equivalents:** ZB-50 _(verified: appears in the quote below)_
- **Supelco/Merck equivalents:** SPB-50 _(verified: appears in the quote below)_
- **Macherey-Nagel equivalents:** Optima-17 _(verified: appears in the quote below)_
- **Quadrex equivalents:** 007-17 _(verified: appears in the quote below)_

## What the source says

> InertCap 17 G3 50% Diphenyl - 50% Dimethylpolysiloxane DB-17, HP-50, CP-Sil 24 CB Rtx-50 ZB-50 SPB-50 HR-17 UA + -17 007-17 VB-50 MEGA-17 Optima-17 AT-50ms Elite-17, PE-17 DA-50+MS AB-50+

## Source

- https://www.glsciencesinc.com/gc-column-equivalent-list-comparison-chart-agilent-restek-phenomenex

Last verified: 2026-08-15. Review by: 2027-08-15.
Part of [GC column stationary phase cross-reference by manufacturer](https://referencesource.org/lab-instrument-consumables-equivalence/).