Welch Materials Topsil Columns

Topsil is Welch’s Next Generation Silica, with larger pore size and greater surface area, distinguishing Topsil stationary phases from those in our Ultisil Series.

• High purity silica (99.99%) with 150Å pore size and 250m2/g surface area
• Good for small molecules and peptides
• Lower back pressure than Ultisil

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