4-Methoxy-4-oxobutanoic acid
Also known as: Mono-methyl succinate, Methyl hydrogen succinate, Succinic acid monomethyl ester, Butanedioic acid, monomethyl ester, 3-Carbomethoxypropanoic acid, monomethyl succinate, mono-Methyl hydrogen succinate
4-Methoxy-4-oxobutanoic acid (CAS 3878-55-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H8O4 and a molecular weight of 132.115 g/mol. Key properties include a melting point of 54-57 °C(lit.), a boiling point of 259.2±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 104.5±16.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3878-55-5
- Jingsj CID
- J-33068-7
- Molecular Formula
- C5H8O4
- Molecular Weight
- 132.115 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 54-57 °C(lit.) |
|---|---|
| Boiling Point | 259.2±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 104.5±16.1 °C |
| Exact Mass | 132.042252 |
| PSA | 63.60000 |
| LogP | -0.21 |
| Vapor Pressure | 0.0±1.1 mmHg at 25°C |
| Refractive Index | 1.436 |
Customs & Trade Information
| HS Code | 2918990090 |
|---|---|
| Summary | 2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Methoxy-4-oxobutanoic acid?
The CAS number of 4-Methoxy-4-oxobutanoic acid is 3878-55-5.
What are the molecular formula and molecular weight of 4-Methoxy-4-oxobutanoic acid?
4-Methoxy-4-oxobutanoic acid has molecular formula C5H8O4 and molecular weight 132.115 g/mol.
What are the upstream and downstream products of 4-Methoxy-4-oxobutanoic acid?
For 4-Methoxy-4-oxobutanoic acid, Upstream Products: Dimethyl succinate, Methyl 4-nitrobutyrate, Methanol; Downstream Products: Methyl 3-bromopropanoate, cis-Vaccenic acid, Trepibutone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Methoxy-4-oxobutanoic acid (CAS 3878-55-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33068-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.