(S)-Styrene oxide
Also known as: (S)-2-Phenyloxirane, (2S)-2-phenyloxirane, (S)-(-)-Styrene oxide, (S)-(-)-Phenylethylene oxide, (S)-(-)-Phenyloxirane, (S)-(-)-Epoxystyrene, (S)-Phenyloxirane, (S)-Phenylethylene oxide, (S)-2-Phenyl-oxirane
(S)-Styrene oxide (CAS 20780-54-5) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C8H8O and a molecular weight of 120.148 g/mol. Key properties include a boiling point of 193.9±9.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 79.4±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H311 — Toxic in contact with skin, 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.
- 20780-54-5
- Jingsj CID
- J-1015826-3
- Molecular Formula
- C8H8O
- Molecular Weight
- 120.148 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 193.9±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 79.4±0.0 °C |
| Exact Mass | 120.057518 |
| PSA | 12.53000 |
| LogP | 1.61 |
| Vapor Pressure | 0.6±0.4 mmHg at 25°C |
| Refractive Index | 1.564 |
| Storage Conditions | 2-8℃ |
GHS Safety & Compliance
- H311 — Toxic in contact with skin
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H331 — Toxic if inhaled
- H350 — May cause cancer
Customs & Trade Information
| HS Code | 2910900090 |
|---|---|
| Summary | 2910900090. epoxides, epoxyalcohols, epoxyphenols and epoxyethers, with a three-membered ring, and their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of (S)-Styrene oxide?
The CAS number of (S)-Styrene oxide is 20780-54-5.
What are the molecular formula and molecular weight of (S)-Styrene oxide?
(S)-Styrene oxide has molecular formula C8H8O and molecular weight 120.148 g/mol.
Is (S)-Styrene oxide hazardous?
(S)-Styrene oxide has GHS signal word Danger and hazard statements H311 — Toxic in contact with skin; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
What are the upstream and downstream products of (S)-Styrene oxide?
For (S)-Styrene oxide, Upstream Products: (S)-(+)-1-Phenyl-1,2-ethanediol 2-tosylate, 2-Chloroacetophenone, (S)-2-Chloro-1-phenylethanol; Downstream Products: (R)-(-)-2-Methoxy-2-phenylethanol, (S)-(+)-2-Methoxy-2-phenylethanol, styrene glycol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "(S)-Styrene oxide (CAS 20780-54-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1015826-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.