Molekula
Sodium silicate FS-III
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Sodium silicate FS-III is a water-soluble inorganic salt used primarily as a binder, adhesive, and corrosion inhibitor in construction, detergents, and water treatment. It also functions as a food additive (E550) for pH regulation and anti-caking properties. This product has a CAS number of 1344-09-8, a molecular formula of Na₂O₃Si, and a molecular weight of 122.06 g/mol. It is stored at ambient conditions but requires careful handling, as it carries a **Danger** signal word. Molekula supplies Sodium silicate FS-III from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Na2O | 20.0-23.0% |
| Apparent Density | 0.50-0.80 g/ml |
| Modulus (M) | 2.80-3.00 |
| Dissolved speed, S | <240 |
| Fineness (Residue on screen) | <5 |
| Silicon Dioxide (SiO2) | 57.0-61.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless monoclinic crystals |
| Melting Point | 1089 °C |
| Boiling Point | 102 °C at 760 mmHg |
| Density | 1.4 (relative, water = 1) |
| Solubility (other solvents) | Very sol in cold & hot water; soluble in dilute sodium hydroxide; insoluble in alcohol, acids (nonahydrate) |
| Vapour Pressure | 18 mmHg |
| Refractive Index | 1.520 |
Source: PubChem CID 23266 (HSDB, PAC Chemical Database, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90031757 |
| CAS Number | 1344-09-8 |
| IUPAC Name | disodium;dioxido(oxo)silane |
| EC Number | 229-912-9 |
| Molecular Formula | Na2O3Si |
| Molecular Weight | 122.06 |
| Exact Mass | 121.9412 |
| SMILES | [O-][Si](=O)[O-].[Na+].[Na+] |
| InChIKey | NTHWMYGWWRZVTN-UHFFFAOYSA-N |
| InChI | InChI=1S/2Na.O3Si/c;;1-4(2)3/q2*+1;-2 |
| PubChem CID | 23266 |
| UN Number | UN3266 |
| REACH Code | Y110 |
| HTS Code | 2839190000 |
| Tariff Code | 2839190000 |
Safety & GHS
-
Corrosive
GHS05
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H335 May cause respiratory irritation
- H372 Causes damage to organs through prolonged or repeated exposure
Precautionary statements
- P234 Keep only in original container
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Britesil
- Carsil
- Dryseq
- Sikalon
- Sodium sesquisilicate
- SODIUM SILICATE
- Sodium silicate glass
- Sodium siliconate
- Sodium water glass
- Waterglass
Frequently asked questions
What is sodium silicate FS-III commonly used for?
Sodium silicate FS-III is primarily used in detergents, water treatment, and as a binder in foundry molds due to its adhesive and buffering properties.
What is the chemical formula and molecular weight of sodium silicate FS-III?
The chemical formula is **Na₂O₃Si** (simplified as Na₂SiO₃), and the molecular weight is **122.06 g/mol**.
How should sodium silicate FS-III be stored?
Store in a cool, dry place at ambient temperature, ensuring the container is tightly sealed to prevent moisture absorption.
What grade or purity level is available for sodium silicate FS-III?
Molekula supplies sodium silicate FS-III in **Food Grade (FS-III)**, meeting regulatory standards for use in food-related applications.
Can Molekula supply sodium silicate FS-III in bulk quantities?
Yes, we offer sodium silicate FS-III in bulk, with packaging options including drums (200L) and IBC totes (1000L).
What documentation comes with an order of sodium silicate FS-III?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a compliance certificate for food-grade applications.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.