Molekula
Silicon Monoxide
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 Monoxide (SiO) is a grayish-black powder composed of silicon and oxygen, primarily used in semiconductor manufacturing, optical coatings, and as a precursor in silicon-based materials. It is evaporated as a thin-film dielectric or insulating layer, serves as a precursor for lithium-ion battery anode materials, and is used in the production of high-purity silicon. CAS 10097-28-6, molecular formula OSi, molecular weight 44.08 g/mol, requires ambient storage with a warning signal word for handling. Molekula supplies Silicon Monoxide 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
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £155.90 per pack ex VAT · £187.08 inc. VAT
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 | Grey/ black solid |
| Identification | Conforms to reference |
| Purity | ≥99.99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Boiling Point | 1880 °C at 760 mmHg |
Source: PubChem CID 66241 (PAC Chemical Database)
Identification
| Property | Value |
|---|---|
| SKU | 90005287 |
| CAS Number | 10097-28-6 |
| IUPAC Name | oxosilicon |
| EC Number | 233-232-8 |
| Molecular Formula | OSi |
| Molecular Weight | 44.08 |
| Exact Mass | 43.9718 |
| SMILES | O=[Si] |
| InChIKey | LIVNPJMFVYWSIS-UHFFFAOYSA-N |
| InChI | InChI=1S/OSi/c1-2 |
| PubChem CID | 66241 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 28112950 |
| Tariff Code | 2811299090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- 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
- P308+313 IF exposed or concerned: Get medical advice/attention
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
- oxidosilicon
- oxosilicon
- oxosilylene
- silanone
- Silicium Oxydatum
- silicon monooxide
- Silicon oxide (SiO)
- Silicon(II) oxide
- Silylene, oxo-
- SiO
Frequently asked questions
What is silicon monoxide (SiO) commonly used for?
Silicon monoxide is primarily used in semiconductor manufacturing, optical coatings, and as a precursor for silicon-based materials in electronics and solar cells.
What is the chemical formula and molecular weight of silicon monoxide?
The chemical formula is OSi, and the molecular weight is 44.08 g/mol.
How should silicon monoxide be stored?
Store silicon monoxide at ambient conditions in a dry, well-ventilated area, away from moisture and incompatible substances.
What purity grades of silicon monoxide does Molekula supply?
Molekula supplies silicon monoxide in technical and semiconductor-grade purity (typically ≥99.9% or higher, depending on application).
Can Molekula supply silicon monoxide in bulk quantities?
Yes, Molekula can provide silicon monoxide in bulk quantities (e.g., drums, bags, or custom packaging), subject to availability and order requirements.
What documentation is provided with a silicon monoxide order?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet detailing purity, impurities, and handling instructions.
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.