Molekula
Silicon Dioxide
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
Silicon dioxide (SiO₂) is a versatile, naturally occurring compound widely used as a thickening agent, anti-caking agent, and abrasive in industries like pharmaceuticals, food production, and cosmetics. It also serves as a key component in glass manufacturing, electronics, and as a filler in plastics and paints. CAS 7631-86-9, molecular formula SiO₂, molecular weight 60.08 g/mol. Store at ambient conditions. Signal word: Danger. Molekula supplies silicon dioxide 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 |
| Purity | ≥ 99.5% |
| Mesh size | 200 Mesh |
| Identification (RAMAN) | Conforms to structure |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Amorphous powder |
| Odour | Odorless |
| Melting Point | 1713 °C |
| Boiling Point | 2230 °C |
| Solubility (other solvents) | Soluble in hot potassium hydroxide and hot sodium hydroxide solutions. Insoluble in ethanol |
| Vapour Pressure | 10 mmHg at 1732 °C |
Source: PubChem CID 24261 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90028617 |
| CAS Number | 7631-86-9 |
| IUPAC Name | dioxosilane |
| EC Number | 231-545-4 |
| Molecular Formula | SiO2 |
| Molecular Weight | 60.08 |
| Exact Mass | 59.9668 |
| SMILES | O=[Si]=O |
| InChIKey | VYPSYNLAJGMNEJ-UHFFFAOYSA-N |
| InChI | InChI=1S/O2Si/c1-3-2 |
| PubChem CID | 24261 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 28112250 |
| Tariff Code | 2811220090 |
Safety & GHS
-
Serious Health Hazard
GHS08
Hazard statements
- H372 Causes damage to organs through prolonged or repeated exposure
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P304+341 IF INHALED: If breathing is difficult, 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, 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
- Acticel
- Diatomaceous silica
- Dioxosilane
- Silica
- Silica, amorphous
- Silica, colloidal
- Silicic anhydride
- Sillikolloid
- Wessalon
- Zorbax sil
Frequently asked questions
What is silicon dioxide (SiO₂) commonly used for?
Silicon dioxide is widely used in industries as a thickening agent, anti-caking agent, food additive (E551), and in manufacturing glass, ceramics, and high-purity silica for electronics.
What is the molecular formula and molecular weight of silicon dioxide?
The molecular formula is **SiO₂**, and the molecular weight is **60.08 g/mol**.
How should silicon dioxide be stored?
Store silicon dioxide in a cool, dry place at ambient temperature, ensuring the container is tightly sealed to prevent moisture absorption.
What grades of silicon dioxide does Molekula supply?
Molekula supplies **high-purity silica** (e.g., fumed silica, colloidal silica, and food-grade SiO₂) depending on application requirements—confirm your specific need.
Can Molekula supply silicon dioxide in bulk quantities?
Yes, Molekula can supply silicon dioxide in bulk, with quantities tailored to your production needs—contact us for pricing and logistics details.
What documentation is provided with a silicon dioxide order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** to ensure compliance and quality assurance.
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.