# dimethyl polysiloxane — GC column stationary phase cross-reference by manufacturer For dimethyl polysiloxane, usp g-code(s) is G1, G2, G9, G38; agilent equivalents is HP-1, DB-1, CP-Sil 5 CB; restek equivalents is Rtx-1; phenomenex equivalents is ZB-1; supelco/merck equivalents is Equity 1, SPB-1, verified against its source on 2026-08-15. - **Phase chemistry:** dimethyl polysiloxane _(verified: appears in the quote below)_ - **USP G-code(s):** G1, G2, G9, G38 _(verified: appears in the quote below)_ - **Agilent equivalents:** HP-1, DB-1, CP-Sil 5 CB _(verified: appears in the quote below)_ - **Restek equivalents:** Rtx-1 _(verified: appears in the quote below)_ - **Phenomenex equivalents:** ZB-1 _(verified: appears in the quote below)_ - **Supelco/Merck equivalents:** Equity 1, SPB-1 _(verified: appears in the quote below)_ - **SGE/Trajan equivalents:** BP1 _(verified: appears in the quote below)_ - **Macherey-Nagel equivalents:** OPTIMA 1 _(verified: appears in the quote below)_ - **Quadrex equivalents:** 007-1 _(verified: appears in the quote below)_ ## What the source says > Rtx-1 | dimethyl polysiloxane | G1, G2, G9, G38 | HP-1, DB-1, CP-Sil 5 CB | BP1 | ZB-1 | OPTIMA 1 | Equity 1, SPB-1 | 007-1 ## Sources disagree More than one authority states this, and they do not state the same thing. Both are reproduced with the source each came from. ### Agilent equivalents restek.com says agilent equivalents is **HP-1, DB-1, CP-Sil 5 CB**, as of 2026-08-15. > Rtx-1 | dimethyl polysiloxane | G1, G2, G9, G38 | HP-1, DB-1, CP-Sil 5 CB | BP1 | ZB-1 | OPTIMA 1 | Equity 1, SPB-1 | 007-1 Source: https://www.restek.com/articles/gc-column-cross-reference discover.restek.com says agilent equivalents is **DB-1ht**, as of 2026-08-15. > Rxi-1HT | dimethyl polysiloxane | | DB-1ht | | ZB-1HT inferno | | | 007-1HT | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says agilent equivalents is **DB-1, DB-PS1**, as of 2026-08-15. > MXT-1 | dimethyl polysiloxane | G1, G2, G9, G38 | DB-1, DB-PS1 | BP1 | | | | UAC-1, UAC-1MS | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says agilent equivalents is **CP-SimDist**, as of 2026-08-15. > MXT-1HT SimDist | dimethyl polysiloxane | G1, G2, G9, G38 | CP-SimDist | | ZB-1XT SimDist | | | UAC-SIM | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart ### Restek equivalents restek.com says restek equivalents is **Rtx-1**, as of 2026-08-15. > Rtx-1 | dimethyl polysiloxane | G1, G2, G9, G38 | HP-1, DB-1, CP-Sil 5 CB | BP1 | ZB-1 | OPTIMA 1 | Equity 1, SPB-1 | 007-1 Source: https://www.restek.com/articles/gc-column-cross-reference discover.restek.com says restek equivalents is **Rxi-1HT**, as of 2026-08-15. > Rxi-1HT | dimethyl polysiloxane | | DB-1ht | | ZB-1HT inferno | | | 007-1HT | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says restek equivalents is **MXT-1**, as of 2026-08-15. > MXT-1 | dimethyl polysiloxane | G1, G2, G9, G38 | DB-1, DB-PS1 | BP1 | | | | UAC-1, UAC-1MS | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says restek equivalents is **MXT-1HT SimDist**, as of 2026-08-15. > MXT-1HT SimDist | dimethyl polysiloxane | G1, G2, G9, G38 | CP-SimDist | | ZB-1XT SimDist | | | UAC-SIM | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart ### Phenomenex equivalents restek.com says phenomenex equivalents is **ZB-1**, as of 2026-08-15. > Rtx-1 | dimethyl polysiloxane | G1, G2, G9, G38 | HP-1, DB-1, CP-Sil 5 CB | BP1 | ZB-1 | OPTIMA 1 | Equity 1, SPB-1 | 007-1 Source: https://www.restek.com/articles/gc-column-cross-reference discover.restek.com says phenomenex equivalents is **ZB-1HT inferno**, as of 2026-08-15. > Rxi-1HT | dimethyl polysiloxane | | DB-1ht | | ZB-1HT inferno | | | 007-1HT | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says phenomenex equivalents is **ZB-1XT SimDist**, as of 2026-08-15. > MXT-1HT SimDist | dimethyl polysiloxane | G1, G2, G9, G38 | CP-SimDist | | ZB-1XT SimDist | | | UAC-SIM | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart ### Quadrex equivalents restek.com says quadrex equivalents is **007-1**, as of 2026-08-15. > Rtx-1 | dimethyl polysiloxane | G1, G2, G9, G38 | HP-1, DB-1, CP-Sil 5 CB | BP1 | ZB-1 | OPTIMA 1 | Equity 1, SPB-1 | 007-1 Source: https://www.restek.com/articles/gc-column-cross-reference discover.restek.com says quadrex equivalents is **007-1HT**, as of 2026-08-15. > Rxi-1HT | dimethyl polysiloxane | | DB-1ht | | ZB-1HT inferno | | | 007-1HT | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says quadrex equivalents is **UAC-1, UAC-1MS**, as of 2026-08-15. > MXT-1 | dimethyl polysiloxane | G1, G2, G9, G38 | DB-1, DB-PS1 | BP1 | | | | UAC-1, UAC-1MS | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart discover.restek.com says quadrex equivalents is **UAC-SIM**, as of 2026-08-15. > MXT-1HT SimDist | dimethyl polysiloxane | G1, G2, G9, G38 | CP-SimDist | | ZB-1XT SimDist | | | UAC-SIM | Source: https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart ## Source - https://www.restek.com/articles/gc-column-cross-reference - https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart - https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart - https://discover.restek.com/articles/gnot3472/gc-column-cross-reference-chart 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/).