Sodium Metasilicate Pentahydrate CAS 10213-79-3

FAQ - Technical & Supply Chain

• Q:

  Is Sodium Metasilicate Pentahydrate the same as anhydrous or nonahydrate material?

  A: No. CAS 10213-79-3 identifies the pentahydrate, Na2SiO3·5H2O. Anhydrous and nonahydrate forms have different water content, formula weight and dosage. State the pentahydrate form, CAS number and dry-matter basis in the purchase specification.
• Q:

  Which specifications should be agreed for Sodium Metasilicate Pentahydrate?

  A: Confirm Na2O, SiO2, dry matter, molar or weight ratio, pH test conditions, insoluble matter, iron, bulk density and particle-size distribution. Cleaning, ceramics and process uses can require different granulation, so compare the complete methods and limits rather than purity alone.
• Q:

  What is the product typically used for?

  A: Sodium Metasilicate Pentahydrate is evaluated as an alkaline silicate builder in detergents, industrial cleaning, metal treatment and related formulations where controlled alkalinity, silica content and water of hydration are compatible with the process.
• Q:

  What are typical physical and solution properties?

  A: Sodium Metasilicate Pentahydrate is a soluble alkaline solid with molar mass about 212.14 g/mol, typical bulk density around 0.80-0.97 g/cm3 and pH of a 1% aqueous solution commonly about 12-13. It can absorb moisture and carbon dioxide, so dry handling is important.
• Q:

  How should Sodium Metasilicate Pentahydrate be stored and handled?

  A: Store in a cool, dry, well-ventilated area in tightly closed moisture-barrier packaging. Avoid exposure to moisture, carbon dioxide, strong acids and incompatible chemicals, use appropriate PPE for alkaline dust and liquid contact, and follow the current safety information during handling and transfer.