XYSIL® hydrophobic fumed silica is based on hydrophilic fumed silica products, aftertreated with HMDS (hexamethyldisilazane) and DDS (Dimethyldichlorosilane) based superficial treatment, or structure modified.

Grade BET surface area[m2/g] Loss on drying [%] pH value Carbon content[%] Surface modification
XYSIL® R120 120 ± 20 ≤ 0.7 6.0-7.5 1.5-2.5 HMDS
XYSIL® R120B 120 ± 20 ≤ 0.7 3.7-4.5 0.6-1.2 DDS
XYSIL® R120H 120 ± 20 ≤ 1.0 5.5-7.5 4.5.-6.5
XYSIL® R170 170 ± 20 ≤ 0.5 5.5-8.0 1.5-2.5 HMDS
XYSIL® R170H 170 ± 20 ≤ 0.7 3.7-4.5 0.7-1.5 DDS
XYSIL® R200 200 ± 20 ≤ 0.5 5.5-7.5 >1.8 HMDS
XYSIL® R210 210 ± 20 ≤ 0.5 7.0-8.5 3.5-6.5
XYSIL® R230 260 ± 20 ≤ 0.5 5.5-8.0 2.5-4.0 HMDS

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