- SiO2r- M = 60,09 g/molr- CAS [7631-86-9]r- EINECS-No.: 231-545-4r- Solub. in water: (20 ºC): insolubler- Tariff number: 2811 22 00 10r- Applications: analytical chemistry, chromatography.rrSPECIFICATIONSrmean pore diameter: 60 ÅrpH (10 %, H2O): approx. 7 rspec. surface: approx. 450 m2/gractivity degree: II(Brockmann/ Shodder) riron (Fe): max. 0,03 %rchlorides (Cl): max. 0,01 %r