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Potassium 3-methoxy-3-oxopropanoate

Also known as: Potassium methyl malonate, Monomethyl malonate potassium salt, Malonic acid monomethyl ester potassium salt, Methyl potassium malonate, Potassium monomethyl malonate, Hydrogen methyl malonate potassium salt, Monomethyl monopotassium malonate, KMM, MFCD00014021, Propanedioic acid, monomethyl ester, potassium salt (1:1)

Potassium 3-methoxy-3-oxopropanoate (CAS 38330-80-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H5KO4 and a molecular weight of 156.178 g/mol. Key properties include a melting point of 200 °C, a boiling point of 232.1ºC at 760 mmHg and a flash point of 103.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
38330-80-2
Jingsj CID
J-6241-9
Molecular Formula
C4H5KO4
Molecular Weight
156.178 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point200 °C
Boiling Point232.1ºC at 760 mmHg
Flash Point103.7ºC
Exact Mass155.982498
PSA66.43000

Customs & Trade Information

HS Code2918990090
Summary2918990090. 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 Potassium 3-methoxy-3-oxopropanoate?

The CAS number of Potassium 3-methoxy-3-oxopropanoate is 38330-80-2.

What are the molecular formula and molecular weight of Potassium 3-methoxy-3-oxopropanoate?

Potassium 3-methoxy-3-oxopropanoate has molecular formula C4H5KO4 and molecular weight 156.178 g/mol.

What are the upstream and downstream products of Potassium 3-methoxy-3-oxopropanoate?

For Potassium 3-methoxy-3-oxopropanoate, Upstream Products: Dimethyl malonate, Methanol, Diethyl malonate; Downstream Products: Methyl 4-methoxyacetoacetate, Methyl 3-oxoheptanoate, Methyl 3-chloro-3-oxopropanoate.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Potassium 3-methoxy-3-oxopropanoate (CAS 38330-80-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6241-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.