Silica
Silicon dioxide,
Silicic anhydride,
Siliceous earth
矽石, 石英, 二氧化矽
分子量：60.0843
Cas No：112945-52-5; 60676-86-0; 7631-86-9
吸附劑、研磨劑、不透明劑、抗結塊劑、增量劑、黏度控制劑。具有些微遮遐力，能增加滑順度，吸油吸水性低[1]。
[1] 張麗卿，『優質保養品選擇策略』，聯經出版社，2003/07/10。
Silica會致痘嗎？為何我用了bareminerals blemish remedy foundation 全面長石頭大痘，裏面含silica,有人跟我一樣嗎？
WHAT-IT-DOES: viscosity controlling, absorbent/mattifier
Details
A white powdery thing that's the major component of glass and sand. In cosmetics, it’s often in products that are supposed to keep your skin matte as it has great oil-absorbing abilities. It’s also used as a helper ingredient to thicken up products or suspend insoluble particles.