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Trans-2-Hexenal

Price range: £8.49 through £169.99

Odour description (decreasing) Green, Leafy, Fruity, Citrus, Spicy, Sharp

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Volume

Clear

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Perfume Extract · Material profile

Trans-2-Hexenal

Odour description (decreasing)

Green, Leafy, Fruity, Citrus, Spicy, Sharp

Citrus Fruity Green Spicy Top note

Green family inspiration

About this material

Trans-2-Hexenal is an incisive green aldehyde with the vivid freshness of snapped leaves, tart apple skin and citrus peel.

Its energy is immediate, bringing a composition into focus with a crisp, almost electric line.

The material is more than a cut-grass effect. A spicy-fruity undertone allows it to animate apple, strawberry and tropical ideas, while its aldehydic sharpness can lend modernity to florals, colognes and green woods.

It captures the moment greenery is disturbed: a leaf torn open, a stem snapped or the skin of an unripe fruit cut by a blade. This vivid immediacy can make an accord feel startlingly present and alive.

Odour profile

The odour is strongly green and leafy, with sharp citrus, green-apple and spicy nuances.

It is bright, penetrating and highly recognisable, becoming more naturalistic and fruit-like as it is carefully diluted.

The opening is piercing and energetic, dominated by leaf sap, tart peel and green apple skin.

Its aldehydic character gives the note a clean, linear projection that commands attention even at very low levels.

With careful dilution, fruitier and more aromatic details emerge.

Citrus, spice and crisp orchard-fruit nuances soften the raw greenery, revealing a versatile material capable of both naturalistic and highly stylised effects.

Using Trans-2-Hexenal in perfumery

Trans-2-Hexenal can create freshly cut stems, leaf sap, fruit skin and crisp green top notes.

It is useful in apple, pear, strawberry, citrus, violet-leaf and botanical accords, and can add tension to soft florals or dry woody structures.

In botanical compositions, it can provide the flash of sap that makes leaves, stems and cut grass feel freshly rendered.

In apple, pear, strawberry and citrus accords, it brings tartness, peel and a convincing sense of unripened texture.

It can also introduce tension to rose, jasmine, violet-leaf and dry-wood structures, preventing softer materials from feeling static.

Because its impact is immediate, gradual dosing allows the desired green detail to remain precise and luxurious.

Creative pairings

Explore Trans-2-Hexenal with galbanum, violet leaf, cis-3-hexenol, bergamot, grapefruit, apple, pear, strawberry, basil, jasmine, cedarwood and vetiver.

Blend with cis-3-hexenol for a fuller green-leaf effect: the trans isomer brings fruity notes, while the cis isomer delivers pure green character.

Precision is essential: a trace can feel remarkably alive, while excess can dominate the entire opening.

For a vivid garden impression, combine it with galbanum, violet leaf, basil, jasmine and wet-earth materials such as geosmin.

For a crisp fruit direction, explore bergamot, grapefruit, apple, pear and strawberry, grounded by cedarwood, vetiver or transparent musk.

Scent character

Highlights from the material’s listed odour profile.

Note position

Top note

TopOpening impression

HeartMain fragrance character

BaseLasting foundation

Open Ingredient Explorer

Odour strength

High

(recommend smelling in a 1% solution or less)

Listed qualitative strength

Tenacity / substantivity

< 8 hour(s) at 10%

Listed reference conditions

Fragrance development

TopHeartBase

Top note

Illustrative note development · no measured evaporation data

Recorded identity reference

Molecular identity

Molecular reference

2D structure for the named substance

C₆H₁₀O

Molecular weight: 98.14 g/mol
IUPAC name: (E)-hex-2-enal

More compound properties

Computed and structural reference properties for the named compound. These are not measured supplier specifications or properties of a complete dilution, mixture or batch.

XLogP (computed): 1.5
Exact mass (Da): 98.073164938
Monoisotopic mass (Da): 98.073164938
Topological polar surface area (Å²): 17.1
Complexity: 64
Formal charge: 0
Hydrogen bond donors: 0
Hydrogen bond acceptors: 1
Rotatable bonds: 3
Heavy atoms: 7
Isotope atoms: 0
Atom stereocentres: 0
Bond stereocentres: 1
Covalent units: 1
SMILES: CCC/C=C/C=O
InChI: InChI=1S/C6H10O/c1-2-3-4-5-6-7/h4-6H,2-3H2,1H3/b5-4+
InChIKey: MBDOYVRWFFCFHM-SNAWJCMRSA-N

Reference data checked 2026-10-27.

This molecular reference matches the catalogue’s recorded CAS and formula. It does not confirm the supplied grade, purity, stereochemistry, isomer proportions, composition, impurities or unlisted constituents.

Fragrance allergen reference

Generic regulatory reference only. This is not a supplier allergen declaration, measured composition, allergen-free claim or finished-product labelling assessment.

Raw-material reference based on recorded CAS numbers. A CAS match identifies a reference entry; it does not verify the supplied grade, composition, purity or finished-product compliance. Naturals, bases and mixtures require composition review.

European Union / Northern Ireland

No direct listed-entry CAS match in this jurisdiction’s held reference set. This does not mean the material is allergen-free. Constituents, grouped entries and natural-material composition may require further review.

Finished-cosmetic declaration thresholds: greater than 0.001% leave-on; greater than 0.01% rinse-off. Apply the current target-market rules to the actual complete formulation; no concentration is inferred here.

Commission Regulation (EU) 2023/1545 · Regulation (EU) 2023/1545 with 11 November 2025 corrigendum; checked 2026-10-26.

Held EU transition dates: placing noncompliant products on the market until 2026-07-31; making them available until 2028-07-31. Check applicability and current law for the intended market. 2025 corrigendum.

Great Britain

Regulation (EC) No 1223/2009, Annex III (Great Britain) · legislation.gov.uk current text checked 2026-10-26.

Current supplier composition or allergen declarations are required to assess naturals, bases, mixtures and actual concentrations. Reference data checked 2026-10-26; bundle 2026-10-27. Supplementary private documents remain separate.

Product specification

Physical stateLiquidColourless to pale yellow, clear mobile liquid

CAS number	6728-26-3
Odour description (decreasing)	Green, Leafy, Fruity, Citrus, Spicy, Sharp
Odour strength	High (recommend smelling in a 1% solution or less)
Perfumery use	Precise leafy-green accents, crisp fruit-peel details and botanical top-note effects.Listed perfumery guidance; this is not an IFRA limit.
Typical use percentage	Effective from the smallest traces, through to 0.1%
Substantivity	< 8 hour(s) at 10%
Solvent	None
Flash point	43 °C
Physical state	Liquid
Physical form	Colourless to pale yellow, clear mobile liquid
Synonyms	trans-2-Hexenal; (E)-Hex-2-enal; Leaf Aldehyde
Molecular formula	C₆H₁₀O
Molecular weight	98.14 g/mol
Supplier IFRA information	Catalogue copy mentions IFRA information, but no reviewed supplier-document record is available in this profile. No certificate, use limit or compliance status is confirmed.

Safety & handling

Listed handling information5 hazard statements23 precautions

Signal word: Danger

Hazard statements

H226 Flammable liquid and vapour.
H302 Harmful if swallowed.
H311 Toxic in contact with skin.
H317 May cause an allergic skin reaction.
H411 Toxic to aquatic life with long lasting effects.

Precautionary statements

P210 Keep away from heat, sparks, open flames and hot surfaces. – No smoking.
P233 Keep container tightly closed.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof electrical, ventilating and lighting equipment.
P242 Use only non-sparking tools.
P243 Take precautionary measures against static discharge.
P261 Avoid breathing vapour or dust.
P264 Wash hands and other contacted skin thoroughly after handling.
P270 Do no eat, drink or smoke when using this product.
P272 Contaminated work clothing should not be allowed out of the workplace.
P273 Avoid release to the environment.
P280 Wear protective gloves/eye protection/face protection.
P301/312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
P303/361/353 IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
P312 Call a POISON CENTER or doctor/physician if you feel unwell.
P330 Rinse mouth.
P333/313 If skin irritation or rash occurs: Get medical advice/attention.
P363 Wash contaminated clothing before reuse.
P370/378 In case of fire: Use for extinction: Foam, Dry chemical, Carbon dioxide.
P391 Collect spillage.
P403/235 Store in a well-ventilated place. Keep cool.
P405 Store locked up.
P501 Dispose of contents/container to: approved disposal site.

Important: For professional formulation use. Review the Safety Data Sheet before handling, storage or use.

Professional-use information

Datasheets & customer documents

Available documents are attached to eligible completed orders in your account.

My account → Orders

Supplementary documents are supplied only where explicitly listed and available. Check documentation information

Purchased as a guest? Follow the SDS request guidance in our Documentation Supply Policy and provide proof of purchase.

Documentation Supply Policy

IFRA formulation guide

Generic reference only — not an IFRA certificate, compliance decision or use recommendation. The Responsible Person and qualified safety assessor must assess the actual finished formula using current applicable IFRA Standards, supplementary documentation where available and the CPSR.

Source: 51st Amendment overview, held source checked 2026-10-21. Bundle 2026-10-27. Individual Standards prevail over the overview.

2-Hexenal

RESTRICTION · CAS 16635-54-4, 505-57-7, 6728-26-3

Category 4 — fine fragrance: 0.0077% in the finished consumer product

All applicable specification, purity and other Standard conditions must also be met.

All IFRA categories and Standard conditions

Category 1	0.0014% in the finished consumer product
Category 2	0.00041% in the finished consumer product
Category 3	0.0083% in the finished consumer product
Category 4	0.0077% in the finished consumer product
Category 5A	0.0020% in the finished consumer product
Category 5B	0.0020% in the finished consumer product
Category 5C	0.0020% in the finished consumer product
Category 5D	0.00067% in the finished consumer product
Category 6	0.0045% in the finished consumer product
Category 7A	0.016% in the finished consumer product
Category 7B	0.016% in the finished consumer product
Category 8	0.00067% in the finished consumer product
Category 9	0.015% in the finished consumer product
Category 10A	0.054% in the finished consumer product
Category 10B	0.054% in the finished consumer product
Category 11A	0.00067% in the finished consumer product
Category 11B	0.00067% in the finished consumer product
Category 12	No numeric restriction in this overview cell; review the full Standard and other applicable requirements.

CAS numbers (comment): The scope of this Standard includes, but is not limited to the CAS number(s) indicated above; any other CAS number(s) used to identify this fragrance ingredient should be considered in scope as well.

Contributions from other sources: See Annex

Flavor use consideration: Due to the possible ingestion of small amounts of fragrance ingredients from their use in products in Categories 1 and 6, materials must not only comply with IFRA Standards but must also be recognized as safe as a flavoring ingredient as defined by the IOFI Code of Practice (www.iofi.org). For more details see chapter 1 of the Guidance for the use of IFRA Standards.

IFRA Standard type: RESTRICTION

Intrinsic property driving the risk management measure: DERMAL SENSITIZATION AND SYSTEMIC TOXICITY

Amendment revised: 51

Existing creations deadline: October 30, 2025

New creations deadline: March 30, 2024

IFRA source overview · Individual IFRA Standards and supplementary documentation

Supplier certificates and private documents are separate evidence. Their availability does not determine whether this generic guide is shown. This is a dated local reference, not a live regulatory feed.

Creative ideas to explore

Creative directions, not tested formulas.

Leaf and blossom

With rose and garden florals

Explore a green floral sketch around a clear flower reference. Compare the leafy accent with the flower alone and decide whether the scene suggests a cut stem, a growing garden or a greener abstraction you want to develop.

Peel and leaf

With bergamot and herbal directions

Use citrus as a bright setting for the green material, then try an herbal alternative as a separate variation. Keeping those contrasts apart makes it easier to choose between a peel-focused idea and a leafy cologne.

A shaded wood

With transparent woods and soft musk

Sketch a green wood direction with a restrained backdrop. Follow the leafy character as the study develops, comparing a wood-only reference to decide whether the scene suggests fresh branches, shaded timber or a softer woodland impression.

Volume	10ml, 30ml, 100ml, 250ml, 500ml, 1l

Dilution Information

MaterialFragrance ingredient

Carrier / solventAs specified for the product

Supplied dilutionCheck the ratio and carrier

Concept illustration only; no dilution ratio or carrier is implied for this material. Refer to the product specification and label.

The suffix D forms part of the product name and indicates that the material is supplied as a dilution rather than at full strength.

POD = Precious Oil Dilution, typically intended for aromatherapy applications.

AOD = Absolute Oil Dilution, indicating that the product is supplied as a diluted absolute.

The dilution ratio and carrier/solvent are stated within the product specification and will also be shown on the product label.

IMPORTANT: Customers should always rely on the product specification when confirming the concentration and carrier/solvent supplied.

While we endeavour to ensure that product names and suffixes accurately reflect the material supplied, the product specification (including the stated dilution ratio and carrier/solvent) shall take precedence in the event of any omission, abbreviation, naming variation, or delayed update to a product title.

Please ensure you have selected the correct material, concentration, dilution ratio and carrier/solvent before completing your purchase.

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Handling precautions

For professional perfumery use only. Not for direct application to skin or ingestion. Keep out of reach of children.

Handle using the precautions specified for the material. Wear suitable protective gloves and eye protection where required.

Keep away from sources of ignition where applicable and avoid release to the environment.

Keep containers securely closed and store under the conditions specified on the product label and SDS. Keep liquid containers upright.

If swallowed or otherwise exposed, follow the SDS first-aid instructions and seek medical advice as appropriate. Do not induce vomiting unless directed by a medical professional.

Product-specific warnings, handling precautions and storage requirements take precedence over this general information.

Read the applicable SDS

A Safety Data Sheet (SDS) is available to logged in users who have purchased this item, where applicable.

Documents are not supplied before purchase.

Read the applicable SDS before handling or using the material. Follow its instructions for hazards, protective equipment, first aid, handling, storage and disposal.

An SDS provides information about the material supplied; it does not replace an assessment of the safety or compliance of a finished formulation.

Please note that supplementary documentation—including, but not limited to, IFRA Certificates, Certificates of Analysis (CoA), Allergen Declarations, and other regulatory or compositional data—may not be available for all products. Refer to the "Supplementary Documentation" tab to check current availability. If the tab is not present, no supplementary documents are available for the material.

Customers intending to use materials in cosmetic applications, including for the preparation of a Cosmetic Product Safety Report (CPSR) under UK and EU Cosmetics Regulations, must contact us prior to purchase to confirm the availability and suitability of any required documentation where it is not explicitly stated. Orders must not be placed in reliance on the assumption that such documentation will be provided where it is not explicitly stated on the relevant product page at the time of purchase.

By proceeding with a purchase without prior written confirmation, you acknowledge and accept that documentation beyond the legally required SDS may not be supplied, and you agree that Perfume Extract shall not be held liable for the absence of such documentation or for any inability to complete regulatory requirements, including CPSR or product compliance obligations.

Products are supplied in accordance with our Documentation Supply Policy

The following supplementary documentation is available as a download to logged in users who have purchased this item:

ALLERGEN

Document scope and limitations

The supplementary documents currently available for this material are identified in this tab. Availability varies between materials.

Batch-specific certificates, analytical results and additional technical data are not guaranteed. They are supplied only where their availability is expressly confirmed in this tab or separately confirmed by us in writing.

Where provided, supplier IFRA documentation does not replace a comprehensive safety assessment or constitute approval of a finished formulation. Customers must consider their complete formulation and intended application.

Any linked IFRA standard is provided for reference and is not a batch-specific specification or analytical certificate for the material supplied.

Do not assume that documentation confirms a particular batch, residual constituent level, manufacturing process or analytical result unless it expressly states this.

The same limitations apply to allergen declarations, Certificates of Analysis (CoAs), technical data sheets, specifications, and other regulatory, analytical or compositional documents. These documents provide information only within their stated scope; they do not replace a comprehensive safety assessment or constitute approval of a finished formulation, nor do they guarantee suitability for a particular application. Customers must assess their complete formulation and intended use.

Customer responsibility

These limitations apply to reliance on all documentation supplied, including IFRA information, allergen declarations, Certificates of Analysis (CoAs), technical data sheets, specifications and other supporting documents.

Perfume Extract is solely a reseller of this product and is not an agent, official distributor, or affiliated in any way with the manufacturer.

Customers are responsible for determining whether the material and available documentation meet their requirements before purchase, and for assessing the safety and compliance of their finished products.

We do not provide formulation instructions, formulation consultancy or confirmation of suitability at a particular concentration or for a particular application.

Producer identity, detailed sourcing and processing information are not disclosed beyond the information published in the product listing.

Please read our Documentation Supply Policy alongside the product specification and available documentation.

Synonyms, alternative names, CAS/EC references, botanical names, manufacturer references and external links may describe a substance or material family generally. They should not, on their own, be taken as confirmation of the supplied material’s producer, geographical origin, manufacturing process, grade, purity, constituent levels or batch characteristics.

In particular, a synonym or reference must not be used to infer that a material is free from a particular constituent, meets a numerical specification, or is suitable for a particular application or concentration.

IFRA information, allergen declarations, Certificates of Analysis (CoAs), technical data sheets and other supporting documents apply only within their expressly stated scope. A general specification or reference document is not a batch-specific analytical result unless it expressly identifies the relevant batch.

If information appears inconsistent, or a particular characteristic is essential to your purchase, contact us for written clarification before ordering. Do not resolve discrepancies by assuming that a synonym, external reference or document for another grade applies to the material supplied.

We do not confirm characteristics beyond those expressly supported by the applicable product specification or our written confirmation. Customers remain responsible for assessing their complete formulation and intended application.

Nothing in this information excludes or restricts liability or statutory rights that cannot lawfully be excluded or restricted.

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Trans-2-Hexenal