Silica Gel:
blue,white
bead form,size 1--2mm,1--3mm,2--5mm
supply over 30 kinds of silica gel
in different application
Silica Gel:
Characteristcs:
MF : mSiO2.nH2O
CAS No.7631-86-9
Color : white or blue
Size : bead form or granular form, from 0.2--1.0mm,1--3mm,2--5mm,3--6mm,4--8mm,etc.
Basic Specification
Silica Gel bead 2-5 mm, | ||||
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Absorption Capacity: RH = 20 % RH = 35 % RH = 50 % RH = 90 % | 9 min 14 min 23 min 31 min |
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Loss Weight on Drying at 150 Deg.C 2 hours % | 5 max |
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Qualified Ratio of Spherical Particle% | 95.0 min |
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Qualified Ratio of Particle Size% | 98.6 min |
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PH | 6.2—6.6 |
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Bulk Density g/L | 700--810 |
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a.Desiccant
b.Chemistry
silica gel is used in chromatography as a stationary phase. In column chromatography the stationary phase is most often composed of silica gel particles of 40-63 μm. Different particle sizes are used for achieving a desired separation of certain molecular sizes. In
this application, due to silica gel's polarity, non-polar components tend to elute before more polar ones, hence the name normal phase chromatography. However, when hydrophobic groups (such as C18 groups) are attached to the silica gel then polar components elute first and the method is referred to as reverse phase chromatography. Silica gel is also applied to aluminum, glass, or plastic sheets for thin layer chromatography.
