Silicon
Also known as: EINECS 231-130-8, MFCD00085311, porous silicon, silicon atom, silicon powder
Silicon (CAS 7440-21-3) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula Si and a molecular weight of 28.09000 g/mol. Key properties include a melting point of 1410ºC, a boiling point of 2355ºC and a density of 2.33. It is classified under GHS with signal word Warning and hazard statements H228. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 7440-21-3
- Jingsj CID
- J-1513652-3
- Molecular Formula
- Si
- Molecular Weight
- 28.09000 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 1410ºC |
|---|---|
| Boiling Point | 2355ºC |
| Density | 2.33 |
| Exact Mass | 27.98000 |
| Additional Property | INSOLUBLE |
GHS Safety & Compliance
- H228
Customs & Trade Information
| HS Code | 2804690000 |
|---|
Frequently Asked Questions
What is the CAS number of Silicon?
The CAS number of Silicon is 7440-21-3.
What are the molecular formula and molecular weight of Silicon?
Silicon has molecular formula Si and molecular weight 28.09000 g/mol.
Is Silicon hazardous?
Silicon has GHS signal word Warning and hazard statements H228.
What are the upstream and downstream products of Silicon?
For Silicon, Upstream Products: Trichlorosilane, Silicon, Silicon tetrafluoride; Downstream Products: Tetradecamethylcycloheptasiloxane, Hexamethylcyclotrisiloxane, Octamethylcyclotetrasiloxane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Silicon (CAS 7440-21-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1513652-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.