1,6-Dioxaspiro[4.4]nonane-2,7-dione

Also known as: 4,4-Dihydroxypimelic acid dilactone, Spirodilactone, gamma-Ketopimelic acid dilactone, 1,6-Dioxaspiro[4.4]nonane-2,7-quinone, NSC 10430, NSC 124079, NSC 66526, MFCD00005531, EINECS 222-499-6

1,6-Dioxaspiro[4.4]nonane-2,7-dione (CAS 3505-67-7) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C7H8O4 and a molecular weight of 156.13600 g/mol. Key properties include a melting point of 69-71ºC(lit.), a boiling point of 452.5ºC at 760mmHg, a density of 1.36g/cm3 and a flash point of 254.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3505-67-7
Jingsj CID: J-1991647-3
Molecular Formula: C₇H₈O₄
Molecular Weight: 156.13600 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	69-71ºC(lit.)
Boiling Point	452.5ºC at 760mmHg
Density	1.36g/cm3
Flash Point	254.1ºC
Exact Mass	156.04200
PSA	52.60000
LogP	0.35670
Refractive Index	1.507

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 1,6-Dioxaspiro[4.4]nonane-2,7-dione?

The CAS number of 1,6-Dioxaspiro[4.4]nonane-2,7-dione is 3505-67-7.

What are the molecular formula and molecular weight of 1,6-Dioxaspiro[4.4]nonane-2,7-dione?

1,6-Dioxaspiro[4.4]nonane-2,7-dione has molecular formula C7H8O4 and molecular weight 156.13600 g/mol.

What are the upstream and downstream products of 1,6-Dioxaspiro[4.4]nonane-2,7-dione?

For 1,6-Dioxaspiro[4.4]nonane-2,7-dione, Upstream Products: 4-Ketopimelic acid, Succinic anhydride, Succinic acid; Downstream Products: Monoethyl 4-oxoheptanedioate, 4-Ketopimelic acid.

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. "1,6-Dioxaspiro[4.4]nonane-2,7-dione (CAS 3505-67-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1991647-3 (accessed 2026-11-09).

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