Silicon Dioxide (SiO₂)

**CAS Number**: 7631-86-9
**Molecular Formula**: SiO₂
**Color and Form**: Silicon dioxide typically appears as a white or colorless crystalline powder or amorphous solid.

Silicon dioxide, also known as silica, is one of the most abundant minerals on Earth. It is widely used in industries due to its hardness, chemical inertness, and thermal stability. SiO₂ exists in various forms, including quartz, sand, and synthetic silica.

**Properties**:
– High melting point (1713°C) and thermal stability.
– Insoluble in water and most acids.
– Excellent electrical insulator.

**Applications**:
1. **Construction**: Used in cement, concrete, and glass manufacturing.
2. **Electronics**: Essential in semiconductor and optical fiber production.
3. **Food and Pharmaceuticals**: Acts as an anti-caking agent and excipient.

**Effects**:
– Enhances strength and durability in construction materials.
– Provides high purity and performance in electronics.

Silicon Dioxide (SiO₂)