Diethyl squarate
方酸二乙酯
Also known as: 3,4-Diethoxy-3-cyclobutene-1,2-dione, Squaric acid diethyl ester, 3,4-Diethoxycyclobut-3-ene-1,2-dione, Diethyl squarate, 3,4-Diethoxy-3-cyclobutene-1,2-dione 98%, 3,4-Diethoxy-3-cyclobuten-1,2-dion, SQUARIC ACID DIETHYL ESTER, MFCD00001333
Diethyl squarate (CAS 5231-87-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H10O4 and a molecular weight of 170.163 g/mol. It is also known as 3,4-Diethoxy-3-cyclobutene-1,2-dione, Squaric acid diethyl ester and 3,4-Diethoxycyclobut-3-ene-1,2-dione. Key properties include a melting point of 19 °C, a boiling point of 325.7±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 135.4±30.7 °C. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 5231-87-8
- Jingsj CID
- J-1991498-1
- Molecular Formula
- C8H10O4
- Chinese Name
- 方酸二乙酯
- Molecular Weight
- 170.163 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 19 °C |
|---|---|
| Boiling Point | 325.7±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 135.4±30.7 °C |
GHS Safety & Compliance
Frequently Asked Questions
What is the CAS number of Diethyl squarate?
The CAS number of Diethyl squarate is 5231-87-8.
What are the molecular formula and molecular weight of Diethyl squarate?
Diethyl squarate has molecular formula C8H10O4 and molecular weight 170.163 g/mol.
Is Diethyl squarate hazardous?
Diethyl squarate has GHS signal word Danger.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diethyl squarate (CAS 5231-87-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991498-1 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.