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COSMOSIL Cholester Columns

Specialty for Structual Isomers / Hydrophobic interaction and planarity selectivity

COSMOSIL Cholester is a new silica based RP column which employs a cholestery bonded phase. Cholester provides enhanced selectivity over traditional C18 materials and greater performance in separating isomers or other closely related compounds. Cholester is ideal for method development and serves as an excellent alternative to traditional C18 columns.

COSMOSIL Cholester
USP codeL101
Silica gelHigh purity porous spherical silica
Average particle size2.5µm
2.5Cholester
3µm
3Cholester
5µm
5Cholester
15µm
15Cholester
Average pore sizeapprox. 130Åapprox. 120Åapprox. 120Åapprox. 120Å
Specific surface areaapprox. 330m2/gapprox. 300m2/gapprox. 300m2/gapprox. 300m2/g
Stationary phaseCholesteryl group
Bonding typeMonomeric
End capping treatmentNear-perfect treatment
Carbon contentapprox. 21%-approx. 20%approx. 20%
pH range2 - 7.5

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