Bulk Resins

Superior quality bare silica and stationary phases synthesized on spherical silica. Rely on Welch’s attention to detail for scalability, reproducibility and high performance.

  • High mechanical strength endures multiple packing/re-packing cycles
  • Ultra-pure (purity > 99.999% SiO2) silica material with near-zero metals contamination
  • End-capped materials ensure optimal resolution and peak shape
Packing MaterialsParticle   Size (μm)Pore   Size (Å)Surface   Area (m2/g)Carbon   Load %EndcappingpH   Stability
Ultisil XB-C187, 10, 2012032017Yes1.5-10.0
Ultisil XB-C18103003208Yes1.5-10.0
Ultisil HS-C188, 1012032017Yes1.5-10.0
Ultisil XB-C810, 2012032012Yes1.5-10.0
Ultisil LP-C181012032010No1.5-10.0
Ultisil AQ-C181012032012Yes1.5-10.0
Ultisil XB-Phenyl1012032012Yes1.5-10.0
Ultisil XB-CN101203207Yes1.5-9.0
Ultisil XB-NH2101203204No2.0-8.0
Ultisil SiO2101203200No2.0-8.0
Ultisil Diol101203202.5No2.0-8.0
Ultisil PAH1012032022Yes1.5-10.0
Ultisil Hilic-Amide101203207Yes2.0-8.0
Ultisil XB-C4101203208Yes1.5-10.0
Ultisil XB-C410300903Yes1.5-10.0
Ultisil XB-SAX101203207.5No2.0-8.0
Ultisil XB-SCX1012032012No2.0-8.0
Ultisil XB-C301012032022Yes2.0-6.0
Ultisil Polar-RP1012032018Yes1.5-10.0
Ultisil PFP1012032012Yes1.5-10.0
Xtimate C187, 1012032014Yes1.0-12.5
Xtimate SEC10120N/AN/AN/A2.0-7.5