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InventoryRef 4151615/10/2010

TRANS-2-HEXENAL

trans-Hex-2-enal

TRANS-2-HEXENAL is linked to 1 EU annex record on this page. Inventory note: III/166.

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MarketEvidence statusRecordsSource language
European UnionEvidence linked
Restricted entry found
Open this evidence		1English and EU languages
Great BritainEvidence linked
Restricted
Open this evidence		1English
CanadaSource mapped
Official source mapped; ingredient rule not imported
0English and French
New ZealandEvidence linked
Restricted
Open this evidence		1English
ASEANSource mapped
Official source mapped; ingredient rule not imported
0English and national languages
ChinaSource mapped
Official source mapped; ingredient rule not imported
0Chinese with selected English material
JapanSource mapped
Official source mapped; ingredient rule not imported
0Japanese; official English translation available
South KoreaEvidence linked
Restricted
Open this evidence		1Korean with some English names
United StatesSource mapped
Official source mapped; ingredient rule not imported
0English
AustraliaSource mapped
Official source mapped; ingredient rule not imported
0English
BrazilSource mapped
Official source mapped; ingredient rule not imported
0Portuguese with INCI crosswalks
IndiaEvidence linked
Restricted
Open this evidence		1English and Hindi
Saudi ArabiaEvidence linked
Restricted
Open this evidence		1Arabic and English

Chemical identity and properties

PubChem 2D chemical structure for CAS 6728-26-3
CAS 6728-26-3PubChem CID 5281168

trans-2-Hexenal

(2E)-hexenal is a 2-hexenal in which the olefinic double bond has E configuration. It occurs naturally in a wide range of fruits, vegetables, and spices. It has a role as an antibacterial agent, a flavouring agent and a plant metabolite. — ChEBI

IUPAC name
(E)-hex-2-enal
Molecular formula
C6H10O
Molecular weight
98.14 g/mol
Exact mass
98.073164938 Da
XLogP3
1.5
Topological polar surface area
17.1 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

(E)-2-HEXENAL2-trans-Hexenal2-Hexenal, (2E)-FEMA No. 256069JX3AIR1IRefChem:1100222229-778-12-HEXENAL
16 more reported names
Hex-2-enalLeaf aldehydetrans-2-Hexen-1-al505-57-7trans-Hex-2-enalbeta-Propyl acrolein2-Hexenal, (E)-Hexylenic aldehyde(2E)-2-HexenalHex-2-en-1-albeta-Propylacrolein(2E)-hex-2-enal3-propyl acrolein(2e)-hexenalalpha,beta-Hexylenaldehyde3-Propylacrolein
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for TRANS-2-HEXENAL

INCI name

TRANS-2-HEXENAL

Description

trans-Hex-2-enal

Record provenance

Inventory reference
41516
Imported identity
TRANS-2-HEXENAL
Source update
15/10/2010
European Commission CosIng source notes
Annex III Restriction reference
Entry 166

TRANS-2-HEXENAL

CAS: 6728-26-3
EC: 229-778-1

Key data

CAS
6728-26-3
EC
229-778-1
Restriction
III/166
Function
PERFUMING
Used for perfume and aromatic raw materials.

Official EU ingredient-name evidence

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

#29008 · TRANS-2-HEXENAL

Ingredients with overlapping formulation functions

TRANS, TRANS-TRIMETHYLPENTADECATRIENONEPERFUMING
TRANS,TRANS-ALLO-OCIMENEPERFUMING
TRANS-2,4-DIMETHYL-2-(5,6,7,8-TETRAHYDRO-5,5,8,8-TETRAMETHYL-2-NAPHTHALENYL)-1,…PERFUMING
TRANS-2-DECENALPERFUMING
TRANS-2-HEXENOLPERFUMING
TRANS-2-HEXENYL BUTYRATEPERFUMING
TRANS-2-HEXENYL HEXANOATEPERFUMING
TRANS-2-HEXENYL ISOVALERATEPERFUMING

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 chemicalsPubChem PUG RESTEU Safety Gate cosmetic product alertsECHA CHEMUS EPA CompToxCosmetic Ingredient Review safety assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortal

How TRANS-2-HEXENAL appears in the CosIng inventory

The CosIng inventory lists TRANS-2-HEXENAL as a cosmetic ingredient and this page links it to 1 annex record. The inventory entry captures names and identifiers, while the annex record shows where the substance is prohibited, restricted or positively listed in EU cosmetics law.

TRANS-2-HEXENAL is also tagged with 1 cosmetic function 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

TRANS-2-HEXENAL appears in the EU CosIng inventory and has linked annex records. Check the annex records above for applicable restrictions, concentration limits and conditions of use. Annex II listing means prohibited; Annex III means restricted; Annexes IV, V and VI mean permitted under specified conditions.

The restriction field for TRANS-2-HEXENAL reads: "III/166". This is the restriction note recorded in the CosIng inventory for this ingredient. For authoritative conditions and limits, always refer to the linked annex entries above.

According to the EU CosIng inventory, TRANS-2-HEXENAL carries the following function designation(s):

CAS 6728-26-3 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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Source note for TRANS-2-HEXENAL

This page combines the CosIng inventory entry for TRANS-2-HEXENAL with 1 linked Annex II–VI record from the local dataset built from public European Commission cosmetic ingredient materials.

Use this inventory page to research TRANS-2-HEXENAL 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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