Diethylstilbestrol
Also known as: DES, Stilboestrol, Stilbestrol, trans-Diethylstilbestrol, 4,4'-(1,2-diethyl-1,2-ethenediyl)bisphenol, (E)-4,4'-(1,2-diethyl-1,2-ethenediyl)bisphenol, α,α'-Diethyl-4,4'-stilbenediol, Stilboesterol, Synthestrin, Cyren, Oestromenin
Diethylstilbestrol (CAS 56-53-1) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C18H20O2 and a molecular weight of 268.350 g/mol. Key properties include a melting point of 170-172 °C(lit.), a boiling point of 407.1±25.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 186.9±17.8 °C. It is classified under GHS with signal word Danger and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 56-53-1
- Jingsj CID
- J-29833-5
- Molecular Formula
- C18H20O2
- Molecular Weight
- 268.350 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 170-172 °C(lit.) |
|---|---|
| Boiling Point | 407.1±25.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 186.9±17.8 °C |
| Exact Mass | 268.146332 |
| PSA | 40.46000 |
| LogP | 5.93 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.603 |
| Stability | Isomerizes rapidly in Benzene, Chloroform, and Ether.Keep Shielded from light. |
| Additional Property | PRACTICALLY INSOLUBLE |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
- H350 — May cause cancer
- H360 — May damage fertility or the unborn child
- H410 — Very toxic to aquatic life with long lasting effects
Activity & Biological Data
| Additional Information | [1]. Troisi, R., et al., Medical conditions among adult offspring prenatally exposed to diethylstilbestrol. Epidemiology, 2013. 24(3): p. 430-8. [2]. Kebir, O. and M.O. Krebs, Diethylstilbestrol and risk of psychiatric disorders: a critical review and new insights. World J Biol Psychiatry, 2012. 13(2): p. 84-95. |
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Customs & Trade Information
| HS Code | 2942000000 |
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Frequently Asked Questions
What is the CAS number of Diethylstilbestrol?
The CAS number of Diethylstilbestrol is 56-53-1.
What are the molecular formula and molecular weight of Diethylstilbestrol?
Diethylstilbestrol has molecular formula C18H20O2 and molecular weight 268.350 g/mol.
Is Diethylstilbestrol hazardous?
Diethylstilbestrol has GHS signal word Danger and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of Diethylstilbestrol?
For Diethylstilbestrol, Upstream Products: (E,E)-Dienestrol, 1,2-bis(4-methoxyphenyl)butan-1-one, 4'-Hydroxypropiophenone; Downstream Products: Hexestrol, Dienestrol diacetate, Fosfestrol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diethylstilbestrol (CAS 56-53-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29833-5 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.