Silicon standard solution (10,000 µg/mL Si in 0.05 M NaOH) is primarily used as a certified reference material for calibrating analytical instruments such as atomic absorption spectroscopy (AAS), inductively coupled plasma optical emission spectrometry (ICP-OES), and ICP-mass spectrometry (ICP-MS). It enables accurate quantification of silicon concentrations in water, soil, biological tissues, alloys, and semiconductor materials during quality control, environmental monitoring, and research.

Additionally, it can serve as a soluble source of silicon in laboratory preparations for sol-gel processes, silica nanoparticle synthesis, or as a dopant in material science experiments requiring precise silicon addition.