3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one

Also known as: 1,4-Cyclohexanedione mono(2,2-dimethyltrimethylene ketal), 1,4-Cyclohexanedione mono-2,2-dimethyltrimethylene acetal, 1,4-Cyclohexanedione mono-2,2-dimethyltrimethylene ketal, 1,4-Cyclohexanedione mononeopentyl ketal, 3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-8-one, MFCD00006652, EINECS 273-918-4

3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one (CAS 69225-59-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C11H18O3 and a molecular weight of 198.259 g/mol. Key properties include a melting point of 45-50 °C(lit.), a boiling point of 295.4±40.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 123.3±13.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 69225-59-8
Jingsj CID: J-2639-1
Molecular Formula: C₁₁H₁₈O₃
Molecular Weight: 198.259 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	45-50 °C(lit.)
Boiling Point	295.4±40.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	123.3±13.8 °C
Exact Mass	198.125595
PSA	35.53000
LogP	1.24
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.484

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. 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 3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one?

The CAS number of 3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one is 69225-59-8.

What are the molecular formula and molecular weight of 3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one?

3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one has molecular formula C11H18O3 and molecular weight 198.259 g/mol.

What are the upstream and downstream products of 3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one?

For 3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one, Upstream Products: Neopentyl glycol, 1,4-Cyclohexanedione, Calcium hypochlorite.

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

Last updated: 8/21/2026

How to cite: Jingsj. "3,3-Dimethyl-1,5-dioxaspiro[5.5]undecan-9-one (CAS 69225-59-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2639-1 (accessed 2026-11-09).

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