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Silica gel for column chromatography, 500-800 mesh medium particle size.
SiO2 500-800 mesh (30-19µm particle size), pH 6-7, pore size 60Å
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Lot Experimental Data
Density (loose): 0.37g/cm³
Density (well-packed): 0.44g/cm³
Column volume: 47mL/20g
Normalized flow rate (2psi): 2.7mL/min

While this silica will enable a fast flow, there is no need for a long column. A short, thick column will generally be better, as long as sample is loaded as a thin layer and column is homogenously packed. Because if a TLC plate of 6-7cm long can separate your compound, so should and can a column of ~10ish cm. A long column will only cause unnecessary peak broadening and if using fine-size silica, high back-pressure.

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See photos and video demonstration for this great convenience and safe health feature.
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The following is an actual separation experiment performed with this silica:
15g of silica (500-800mesh) was added to a cotton-blocked glass chromatography column with I.D. 2.6cm(silica height ~8cm). Silica column was then wetted and packed using AAdvance’s in situ wet pack method (ref. AAdvance Instruments blog 06/2023). Column volume (lot) was 25mL. 0.2g dimethyl maleate (d.m.m.) and 0.2g dimethyl fumerate (d.m.f.) were loaded onto column as a suspension in 5% ethyl acetate in hexanes (4mL). Then, 10% ethyl acetate in hexanes was added as eluting solvent to start separation. Gentle pressurization of ~2psi was applied to column. Solvent was collected with test tubes with volumetric marks. The first fraction (d.m.f.) started eluting out at 65mL and finished eluting by 95-100mL. The second fraction (d.m.m.) started coming out at 115mL, and at the same time eluting solvent was replenished with 25% ethyl acetate in hexanes instead. Eluting finished at around ~150mL. See separation results by TLC spotting in image. This is a challenging separation, not only because of the compounds’ closeness in Rf and polarity, but also due to the fact that d.m.f. dissolves poorly in hexanes or 5% ethyl acetate in hexanes, causing peak broadening.