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CAS 126-15-8 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 3323315/10/2010

DIBUTYLENE TETRAFURFURAL

1,4,4a,5a,6,9,9a,9b-Octahydrodibenzofuran-4a-carbaldehyde

DIBUTYLENE TETRAFURFURAL is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 126-15-8

CAS 126-15-8PubChem CID 31341

2,3:4,5-Di(2-butenyl)tetrahydrofurfural

IUPAC name: 4,5a,6,9,9a,9b-hexahydro-1H-dibenzofuran-4a-carbaldehyde

Molecular formula: C13H16O2
Molecular weight: 204.26 g/mol
Exact mass: 204.115029749 Da
XLogP3: 2.1
Topological polar surface area: 26.3 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 2
Covalent units: 1
Defined stereocentres: 0

Also known as

Mgk repellent 11Dibutylene tetrafurfural1,5a,6,9,9a,9b-Hexahydro-4a(4H)-dibenzofurancarboxaldehydeCaswell No. 0894a(4H)-Dibenzofurancarboxaldehyde, 1,5a,6,9,9a,9b-hexahydro-2,3,4,5-Bis(2-butylene)tetrahydro-2-furaldehydeMGK R-11HSDB 5609

16 more reported names

UNII-C62PHK07EV2,3,4,5-Bisbutylene tetrafurfuralEINECS 204-773-7BRN 0011685AI3-17596Bis-delta(sup 2)-butylenetetrahydrofurfuralNSC-529652,3,4,5-Bis(delta-2-butylene)tetrahydrofurfural2,3,4,5-Bis(delta(sup 2)-butylene)tetrahydrofurfural2,3,4,5-Bis(delta(sup 2)-butenylene)tetrahydrofurfural4-17-00-05023 (Beilstein Handbook Reference)Bis(.DELTA.2-butylene)tetrahydrofurfural2,3:4,5-Bis(2-butenylene)tetrahydrofurfural2,3,4,5-Bis(.DELTA.2)butylene)tetrahydrofurfural2,3,4,5-Bis(.DELTA.2-butylene)tetrahydrofurfural2,3,4,5-Bis(.DELTA.2)butenylene)tetrahydrofurfural

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

EPA DTXSID:DTXSID3041320

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match31341

Attributed physical-property, hazard, environmental and use annotations.

Boiling Point: 307 °C Source: Hazardous Substances Data Bank (HSDB)
Boiling Point: 307 °C @760 [mm Hg] Source: PAC Chemical Database, U.S. Department of Energy

Color/Form: PALE YELLOW LIQUID Source: Hazardous Substances Data Bank (HSDB)

Density: 1.10 @ 20 °C/4 °C Source: Hazardous Substances Data Bank (HSDB)
Density: DENSITY: 1.120 @ 20 °C/20 °C /TECHNICAL GRADE/ Source: Hazardous Substances Data Bank (HSDB)
Density: 1.10 @ 20°C Source: PAC Chemical Database, U.S. Department of Energy

Melting Point: -80 °C Source: Hazardous Substances Data Bank (HSDB)
Melting Point: -80 °C Source: PAC Chemical Database, U.S. Department of Energy

Odor: FRUITY ODOR Source: Hazardous Substances Data Bank (HSDB)

Physical Description: Pale yellow liquid with a fruity odor; [HSDB] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Solubility: PRACTICALLY INSOL IN WATER & IN DILUTE ALKALI; MISCIBLE WITH PETROLEUM OILS, TOLUENE, XYLENE, ETHANOL Source: Hazardous Substances Data Bank (HSDB)

GHS Hazard Statements: H411 (100%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
Precautionary Statement Codes: P273, P391, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
ECHA C&L Notifications Summary: The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory. Source: European Chemicals Agency (ECHA)

Sources/Uses: Used as insect repellent; No longer registered with the EPA for use in the US, cancelled; [HSDB] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Uses: The active ingredient is no longer contained in any registered pesticide products ... "cancelled." Source: Hazardous Substances Data Bank (HSDB)
Uses: INSECT REPELLENT Source: Hazardous Substances Data Bank (HSDB)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for DIBUTYLENE TETRAFURFURAL

INCI name

DIBUTYLENE TETRAFURFURAL

Description

1,4,4a,5a,6,9,9a,9b-Octahydrodibenzofuran-4a-carbaldehyde

Record provenance

Inventory reference: 33233
Imported identity: DIBUTYLENE TETRAFURFURAL
Source update: 15/10/2010

European Commission CosIng source notes

Annex records for DIBUTYLENE TETRAFURFURAL

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Key data

CAS

126-15-8

204-773-7

Restriction

—

Function

ANTIOXIDANT: Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
VISCOSITY CONTROLLING: Increasing or decreasing the viscosity (thickness) of cosmetics.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#8462 · DIBUTYLENE TETRAFURFURAL

Ingredients with overlapping formulation functions

DI-C20-40 ALKYL DIMER DILINOLEATESKIN CONDITIONING, VISCOSITY CONTROLLING

DIALLYLOXYNEOHEXYL ZIRCONIUM TRIDECANOATEVISCOSITY CONTROLLING

DIBEHENYL FUMARATEVISCOSITY CONTROLLING

DIBENZYLIDENE SORBITOLVISCOSITY CONTROLLING

DIDODECYL BUTANETETRACARBOXYLATECLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING, SURFACTANT - FOAM BOOSTING, VISCOSITY …

DIETHANOLAMINOOLEAMIDE DEASURFACTANT - CLEANSING, SURFACTANT - FOAM BOOSTING, VISCOSITY CONTROLLING

DIETHYLENE GLYCOLFRAGRANCE, PERFUMING, SOLVENT, VISCOSITY CONTROLLING

DIGLYCERIN/DILINOLEIC ACID/HYDROXYSTEARIC ACID COPOLYMEREMULSION STABILISING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - EMULSIFYING, VISCOSITY CONTROLLING

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How DIBUTYLENE TETRAFURFURAL appears in the CosIng inventory

The CosIng inventory lists DIBUTYLENE TETRAFURFURAL as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

DIBUTYLENE TETRAFURFURAL is also tagged with 2 cosmetic functions in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

DIBUTYLENE TETRAFURFURAL is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, DIBUTYLENE TETRAFURFURAL carries the following function designation(s):

CAS 126-15-8 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.

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Use the INCI Checker to screen a full ingredient list across selected markets, or compare this substance across all supported market datasets.

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Source note for DIBUTYLENE TETRAFURFURAL

This page reproduces the CosIng inventory entry for DIBUTYLENE TETRAFURFURAL from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research DIBUTYLENE TETRAFURFURAL and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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Tools & next steps

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Regulatory evidence by market

Chemical identity and properties

2,3:4,5-Di(2-butenyl)tetrahydrofurfural

Evidence from additional scientific databases

NIH PubChem PUG-View

Boiling Point 2

Color/Form 1

Density 3

Melting Point 2

Odor 1

Physical Description 1

Solubility 1

GHS Classification 3

Uses 3