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

CAS 3505-67-7C7H8O4Chemical Synthesis

1,6-Dioxaspiro[4.4]nonane-2,7-dione (CAS: 3505-67-7), with a molecular weight of 156.14 g/mol, is a spirocyclic dilactone. This compound functions as a valuable building block in organic synthesis, particularly in polymer chemistry and the development of novel materials. Its structure lends itself to ring-opening polymerisation and as a precursor in complex molecule construction.

IUPAC: 4,4-Dihydroxypimelic acid dilactone,Spirodilactone
Synonyms: 3505-67-74,4-Dihydroxypimelic acid dilactoneSpirodilactoneC7H8O4

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1,6-Dioxaspiro[4.4]nonane-2,7-dione (C7H8O4) — chemical structure, CAS 3505-67-7; Chemistry, fine chemical supplied by Tech Serve Solutions

Building BlocksCarbonyl CompoundsChemical SynthesisLactonesOrganic Building Blocks

01 /Applications

Curing Agent for Epoxy Resins

1,6-Dioxaspiro[4.4]nonane-2,7-dione has been utilised in the curing of diglycidyl ether of bisphenol A (DGEBA) epoxy resins. Ytterbium triflate has been employed as an effective initiator for this curing process, demonstrating its utility in polymer formulation.

Organic Synthesis Intermediate

As a dilactone, this compound serves as a versatile intermediate in various organic synthesis pathways. It can be incorporated into the synthesis of complex organic molecules and functional polymers.

Building Block for Novel Materials

The unique spirocyclic structure of 1,6-Dioxaspiro[4.4]nonane-2,7-dione makes it an interesting building block for the creation of new materials with tailored properties.

02 /Properties

Molecular weight	156.14
Empirical formula	C7H8O4
Assay	≥96.0% (GC)
Application	1,6-Dioxaspiro[4.4]nonane-2,7-dione was used to cure diglycidylether of bisphenol A (DGEBA) with ytterbium triflate as initiator1.
Melting point	69-71 °C(lit.)69-71 °C

03 /Safety & handling

Protective equipment	Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
Water hazard class (WGK, DE)	3

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

3505-67-7

MDL number

MFCD00005531

PubChem substance

24856445

Beilstein registry

128330

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is 1,6-Dioxaspiro[4.4]nonane-2,7-dione used for?

1,6-Dioxaspiro[4.4]nonane-2,7-dione is used as a building block in organic synthesis and has been applied in the curing of epoxy resins, such as diglycidyl ether of bisphenol A (DGEBA).

What is the CAS number and molecular formula for 1,6-Dioxaspiro[4.4]nonane-2,7-dione?

The CAS number is 3505-67-7 and the empirical formula is C7H8O4.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies 1,6-Dioxaspiro[4.4]nonane-2,7-dione with an assay of ≥96.0% (GC). We do not represent this product as USP, BP, EP, or other pharmacopoeia grades.

How should 1,6-Dioxaspiro[4.4]nonane-2,7-dione be handled safely?

Handle with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. The compound has a WGK Germany classification of 3, indicating it is hazardous to water.