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2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione

Also known as: 5-Isopropylidene-2,2-dimethyl-[1,3]dioxane-4,6-dione, 2,2-Dimethyl-5-isopropylidene-1,3-dioxane-4,6-dione, 2,2-Dimethyl-5-propan-2-ylidene-1,3-dioxane-4,6-dione, Isopropylidene Meldrum's acid, 1,3-Dioxane-4,6-dione, 2,2-dimethyl-5-(1-methylethylidene)-

2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione (CAS 2231-66-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H12O4 and a molecular weight of 184.18900 g/mol. Key properties include a melting point of 128 °C, a boiling point of 378ºC at 760mmHg, a density of 1.138g/cm3 and a flash point of 199.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
2231-66-5
Jingsj CID
J-1342454-9
Molecular Formula
C9H12O4
Molecular Weight
184.18900 g/mol
Category
Ketones
Last updated
8/21/2026
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Physicochemical Properties

Melting Point128 °C
Boiling Point378ºC at 760mmHg
Density1.138g/cm3
Flash Point199.5ºC
Exact Mass184.07400
PSA52.60000
LogP1.15890
Vapor Pressure6.48E-06mmHg at 25°C
Refractive Index1.464
Storage Conditions2-8°C

Customs & Trade Information

HS Code2934999090
Summary2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione?

The CAS number of 2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione is 2231-66-5.

What are the molecular formula and molecular weight of 2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione?

2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione has molecular formula C9H12O4 and molecular weight 184.18900 g/mol.

What are the upstream and downstream products of 2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione?

For 2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione, Upstream Products: Meldrum's acid, tert-Butanol; Downstream Products: 3-methyl-3-(4-methylphenyl)butanoic acid, 2,2-dimethyl-5-propan-2-yl-1,3-dioxane-4,6-dione, 5,6-Dimethoxy-3,3-dimethyl-1-indanone.

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

Last updated:

How to cite: Jingsj. "2,2-Dimethyl-5-(1-methylethylidene)-1,3-dioxane-4,6-dione (CAS 2231-66-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1342454-9 (accessed 2026-11-09).

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