Styrene
Also known as: EINECS 202-851-5, MFCD00008612, STYROL, SYRENE, Sryrene, Stirolo, Styreen, Styren, Styrole, Styron, styrene
Styrene (CAS 100-42-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H8 and a molecular weight of 104.149 g/mol. Key properties include a melting point of -31 °C, a boiling point of 145.2±7.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 31.1±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 100-42-5
- Jingsj CID
- J-1991587-0
- Molecular Formula
- C8H8
- Molecular Weight
- 104.149 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
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Request a quotePhysicochemical Properties
| Melting Point | -31 °C |
|---|---|
| Boiling Point | 145.2±7.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 31.1±0.0 °C |
| Exact Mass | 104.062599 |
| LogP | 2.70 |
| Additional Property | 3.6 (vs air) |
| Vapor Pressure | 6.2±0.1 mmHg at 25°C |
| Refractive Index | 1.558 |
| Additional Property | 0.3 g/L (20 ºC) |
| Additional Property | -30.6℃ |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H332 — Harmful if inhaled
- H372 — Causes damage to organs through prolonged exposure
Customs & Trade Information
| HS Code | 2902500000 |
|---|
Frequently Asked Questions
What is the CAS number of Styrene?
The CAS number of Styrene is 100-42-5.
What are the molecular formula and molecular weight of Styrene?
Styrene has molecular formula C8H8 and molecular weight 104.149 g/mol.
Is Styrene hazardous?
Styrene has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Styrene (CAS 100-42-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991587-0 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.