by Welch Materials
| Vendor | Welch Materials | Length | |
| Brand | Ultisil XB-C4 | Internal Diameter | |
| Modifification | Silica/C4 | Pore size | 300 |
| Mode | Reversed-Phase | Surface Area | 320 |
| Particle Size |
| Vendor | Brand | Mode | Modification | Int. diam. | Length | Particles | Pores | Price |
|---|---|---|---|---|---|---|---|---|
| Unimicro Technologies Inc. | Globalsil-120-10-C4 | Reversed-Phase | Silica/C4 | 50.0 mm | 150 mm | 10.0 μm | 120 Å | On request |
| RSTech | HECTOR-M C4 | Reversed-Phase | Silica/C4 | 3.0 mm | 50 mm | 5.0 μm | 100 Å | On request |
| ACE | ACE C4 | Reversed-Phase | Silica/C4 | 2.1 mm | 35 mm | 3.0 μm | 100 Å | On request |
| CHEMINDIA | CHEMSIL-BUTYL-C4 | Reversed-Phase | Silica/C4 | 4.0 mm | 100 mm | 3.0 μm | 100 Å | On request |
| Luknova | Poro C4-300 | Reversed-Phase | Silica/C4 | 21.2 mm | 150 mm | 5.0 μm | 300 Å | On request |
| ES Industries | Chromegabond 4000 C4 | Reversed-Phase | Silica/C4 | 2.0 mm | 50 mm | 5.0 μm | 4000 Å | On request |
| CHEMINDIA | CHEMSIL-BUTYL-C4 | Reversed-Phase | Silica/C4 | 2.0 mm | 250 mm | 5.0 μm | 100 Å | On request |
| Thermo Fisher Scientific | Hypurity | Reversed-Phase | Silica/C4 | 2.1 mm | 150 mm | 5.0 μm | 190 Å | On request |
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