Merck, 1055540001, TLC aluminum sheets, Silica gel 60 F₂₅₄

General description
25 Aluminium sheets 20 x 20 cm
Our classical silica TLC plates are based on a combination of our proven silica gel 60 and the addition of a unique polymeric binder resulting in a very adherent and hard surface that will not crack or blister and even allow writing with a pencil on the surface without risk to damage the layer.
Application
Aluminum TLC plate, silica gel coated with flourescent indicator F₂₅₄. The silica gel TLC plates come in a quantity of 25 size 20x20 cm for thin layer chromatography applications.
Analysis Note
Specific surface area (according to BET; 5-Pt. measurement): 480 - 540 m²/g
Pore volume (N₂-isotherm): 0.74 - 0.84 ml/g
d 50 (laser diffraction, size distribution): 9.7 - 11.7 µm
Layer thickness: 175 - 225 µm
Deviation of layer thickness per plate: ≤ 30 µm
A) Colour test
Bleu VIF Organol: 11 - 25
Ceres black: 34 - 48
Ceres violet BRN: 52 - 67
Separation number: ≥ 10.5
B) Steroid test
Hydrocortisone: 25 - 37
Reichstein S: 37 - 49
Methyltestosterone: 42 - 54
Typical value determined on a conditioned sheet
Eluent A) Toluene (45% rel.humidity)
Eluent B) Ethyl acetate/Toluene (95/5 v/v; 20% rel.humidity)
Other Notes
Replaces: 5554-7; 5554