Silicon oxide

Silicon Oxide (IV) or Silicon Dioxide (SiO2) is a compound of silicon and oxygen , commonly called silica. It is one of the components of the sand. One of the ways it appears naturally is quartz .


[ hide ]

  • 1 Physical properties
  • 2 Chemical properties
  • 3 Use
  • 4 Damage to health
  • 5 Source

Physical properties

  • Aggregation state: solid
  • Appearance: transparent
  • Density: 2634 kg / m3; 2,634 g / cm3
  • Molar mass: 60.0843 g / mol
  • Melting point: 1986 K (-271,164 ° C)
  • Boiling point: 2503 K (-270,647 ° C)
  • Crystal structure: Quartz, cristobalite or tridymite

Chemical properties

  • Water solubility; 0.012 g in 100 g of water.


  • Silicon (IV) oxide is used, among other things, to make glass, ceramics, and cement.
  • Silica gel is a desiccant, that is, it removes moisture from where it is. It is very generally found in new packages of optical, electronic devices.

Damage to health

In the lungs , silicon oxide can cause silicosis – scarring of the alveoli that prevents oxygen from reaching the blood. Silicosis can make it hard to breathe and sometimes can even lead to death. In addition, it increases the risk of tuberculosis and lung cancer . Many industrialized countries have restricted the use of silicon sand in sandblasting work.

Silicosis usually develops in about 20 years, although it sometimes appears 5 or 10 years after being exposed to the harmful agent, it all depends on the degree of exposure and whether the worker protected himself or not. However, silicosis can also appear within a few weeks of working amid dense clouds of crystalline silicon oxide, if not protected. The danger doesn’t go away because you don’t see silicon oxide dust, and silicosis can worsen even if it’s been years since you moved away from harmful dust.


Leave a Comment