Project Description

Product Name Silicon Dioxide
CAS No. 7631-86-9
Molecular Formula: O2Si
Einecs 231-545-4
Synonyms Silica; Silicon dioxide
All Items Description
COLOR White to yellow
SOLUBILITY Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.
PH 5-8 (100g/l, H2O, 20℃)(slurry)
SENSITIVE Hygroscopic
Appearance White powder



Silicon dioxide occurs almost everywhere on earth. It is one of the most important and abundant oxides on earth, constituting about 60% weight of the earth’s crust as silica itself or in combination with other metal oxides in silicates. It commonly is found as sand in the vast ocean and river shores, their beds, deserts, rocks, and minerals.


Silica is used primarily in the production of glass for windows, drinking glasses, beverage bottles, and many other uses. The majority of optical fibers for telecommunications are also made from silica. It is a primary raw material for many whiteware ceramics such as earthenware, stoneware, porcelain, as well as industrial Portland cement.

Silica is a common additive in the production of foods, where it is used primarily as a flow agent in powdered foods, or to absorb water in hygroscopic applications. It is the primary component of diatomaceous earth which has many uses ranging from filtration to insect control. It is also the primary component of rice husk ash which is used, for example, in filtration and cement manufacturing.


Silicon dioxide is one of the popular food additives and ingredients in most countries, As a professional Silicon dioxide supplier and manufacturer, Pandachem International Corporation has been supplying and exporting Silicon dioxide from China for many years, please be assured to buy Silicon dioxide at Pandachem. Any inquiries and problems please feel free to send emails to us via, we will reply you within 1 working day.