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Silicic acid

CAS Number
1343-98-2
EC Number
215-683-2
Molecular Weight
96.11 g/mol

Description

Silicic acid (CAS 1343-98-2 ), also known as orthosilicic acid or monosilicic acid, is the soluble monomeric form of silicon that serves as the bioavailable silicon source in aqueous systems. It functions as a stabilizer, rheology modifier, and foam control agent across water treatment, food, pharmaceutical, and personal care applications. In water treatment, it is dosed into distribution systems. This process forms protective silicate films on pipe surfaces, reducing corrosion and scale deposition. Food and supplement manufacturers use it as a bioavailable silicon source in functional beverages. These nutritional formulations target bone and connective tissue support. In pharmaceutical manufacturing, it acts as a stabilizing agent in liquid formulations where controlled silica chemistry is required. This prevents active ingredient degradation. Personal care formulators incorporate it into skin-conditioning products and hair treatments where soluble silicon is preferred over particulate silica. The material is supplied primarily as aqueous solution, with concentration and stabilization varying by application. Technical-grade and food-grade specifications are the most commonly sourced. Food-grade material is subject to purity requirements aligned with FCC standards. Pharmaceutical-grade supply is available for regulated manufacturing with documentation supporting USP compliance. Additional documentation is available for Ph. Eur. requirements. This ensures the highest quality standards are met for sensitive industrial and medical applications across global markets. Contact us for supply of Silicic acid Request Quote

Other Names (Synonyms)

Orthosilicic acid | Monosilicic acid | Silicon tetrahydroxide | Silicasol | Silicic acid (Si(OH)4) | Silicic acid (ortho) | Silica acid | Polysilicic acid

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Density0.230 g/cm³
Appearancewhite powder
ColorWhite
OdorOdorless
Formpowder
Water SolubilitySoluble in water.

Safety & Handling

Danger
GHS05· CorrosiveGHS07· Irritant

Hazard Statements

H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H335May cause respiratory irritation

Precautionary Statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P363Wash contaminated clothing before reuse.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P233Store in a well-ventilated place. Keep container tightly closed.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

WGK (Germany)3