Ningbo Innopaharmchem Co., Ltd. specializes in providing high-quality chemical compounds that drive industrial innovation. Among our extensive product range, Hydrated Silica, identified by CAS number 10279-57-9, stands out for its distinctive chemical properties and broad applicability. This document aims to elucidate the core chemical aspects of this versatile material.

The fundamental chemical composition of hydrated silica is silicon dioxide (SiO2) with a variable amount of water molecules incorporated into its structure, often represented by the general formula SiO2 · nH2O. This hydration means that water molecules are bonded to the silica surface, typically as silanol groups (Si-OH). These surface hydroxyl groups are responsible for much of hydrated silica's reactivity and its hydrophilic nature. The amorphous structure, meaning it lacks a regular crystalline lattice, further contributes to its unique properties, such as a high surface area and porous structure.

The chemical stability of hydrated silica is generally high under normal conditions, but it exhibits specific reactivities. It is soluble in strong alkalis like sodium hydroxide and hydrofluoric acid, a property exploited in certain industrial processes. Its insolubility in water and most acids (except hydrofluoric acid) ensures its stability in aqueous environments, which is crucial for many applications. The high temperature resistance is another key chemical characteristic, allowing it to maintain its integrity in processes involving elevated temperatures.

The high surface area of hydrated silica, often measured using techniques like BET (Brunauer-Emmett-Teller), is a direct result of its porous, three-dimensional network structure. This large surface area facilitates strong interactions with other molecules, making it an excellent adsorbent, reinforcing agent, and carrier. The nature of the surface hydroxyl groups dictates its compatibility and reactivity with various organic and inorganic compounds. For instance, in rubber applications, these groups are crucial for bonding with silane coupling agents, which then link the silica to the rubber polymer matrix.

Understanding these chemical properties is vital for optimizing the use of hydrated silica in applications ranging from rubber reinforcement to ceramic manufacturing and coating formulations. Ningbo Innopaharmchem Co., Ltd. ensures that our hydrated silica products meet stringent purity and structural specifications, providing our clients with a reliable foundation for their advanced material development. Our technical team is available to discuss the specific chemical attributes of our hydrated silica and how they can best be leveraged for your unique industrial needs.