About this material
Hydroxycitronellal
Hydroxycitronellal is a Lily of the Valley light floral sweet Linden Blossom fresh delicate Muguet material.
Scent character
Highlights from the material’s listed odour profile.
Note position
Heart note · Base note
Material character
A closer lookOdour strength
Listed qualitative strength
Tenacity / substantivity
218 hour(s)
at 100%
Listed reference conditions
Fragrance development
Heart note · Base note
Illustrative note development · no measured evaporation data
Molecular identity
C10H20O2
CAS-linked compound reference — Hydroxycitronellal
This compound record is linked to the explicitly recorded CAS number. It is not supplier confirmation of the supplied grade, purity, stereochemistry, isomer proportions or complete composition.
- Reference molecular weight
- 172.26 g/mol
- Reference IUPAC name
- 7-hydroxy-3,7-dimethyloctanal
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)
- 1.6
- Exact mass (Da)
- 172.146329876
- Monoisotopic mass (Da)
- 172.146329876
- Topological polar surface area (Ų)
- 37.3
- Complexity
- 130
- Formal charge
- 0
- Hydrogen bond donors
- 1
- Hydrogen bond acceptors
- 2
- Rotatable bonds
- 6
- Heavy atoms
- 12
- Isotope atoms
- 0
- Atom stereocentres
- 1
- Bond stereocentres
- 0
- Covalent units
- 1
- SMILES
- CC(CCCC(C)(C)O)CC=O
- InChI
- InChI=1S/C10H20O2/c1-9(6-8-11)5-4-7-10(2,3)12/h8-9,12H,4-7H2,1-3H3
- InChIKey
- WPFVBOQKRVRMJB-UHFFFAOYSA-N
Reference data checked 2026-10-27.
CAS 107-75-5 · reference checked 2026-10-27.
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
- Hydroxycitronellal — Annex III entry 72; single-substance reference. Recorded CAS match only; composition and scope require assessment.
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
- Hydroxycitronellal — Annex III entry 72; single-substance reference. Recorded CAS match only; composition and scope require assessment.
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.
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
| CAS number | 107-75-5 |
|---|---|
| Odour description (decreasing) | Floral Muguet, Fresh, Green, Sweet, Waxy |
| Odour strength | Medium |
| Perfumery use | Effective from the smallest traces, through to 1%Listed perfumery guidance; this is not an IFRA limit. |
| Substantivity | 218 hour(s) at 100% |
| Solvent | None |
| Physical state | Liquid |
| Synonyms | 7-hydroxy-3,7-dimethyloctanal, Cyclosia, l-Laurinal, Hydroxy Citronellal, Hydronal, Hydronyl, Hysimal, Laurinal, Laurine, Phixia, Fixol, Tillal, Hylea Coeur, Tilkul, Storine, Phixia, Oxydihydrocitronellal, Muguettine Principe, Maial, Lily Aldehyde, Hylea, Cyclo Hydronal, Cyclodor, Cyclia, Cyclalia, Citronellal Hydrate, Hylea, Anthosal, Centaflor, Majal, Fixonal, Tilleul, Cyclohydron |
| 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
Contains: Hydroxycitronellal
Hazard statements:
- H317 May cause an allergic skin reaction.
- H319 Causes serious eye irritation.
- H402 Harmful to aquatic life.
Precautionary statements:
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
- P273 Avoid release to the environment.
- P280 Wear protective gloves/protective clothing/eye protection/face protection.
- P302+P352+P333+P313 IF ON SKIN: Wash with plenty of soap and water. If skin irritation or rash occurs: Get medical advice/attention.
- P305+P351+P338+P337+P313 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention.
- P362+P364 Take off contaminated clothing and wash it before reuse.
Professional/Industrial use only.
Datasheets & customer documents
Available documents are attached to eligible completed orders in your account.
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Supplementary documents are supplied only where explicitly listed and available. Check documentation information
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Documentation Supply PolicyIFRA 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.
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.
Source: 51st Amendment overview, held source checked 2026-10-21. Bundle 2026-10-27. Individual Standards prevail over the overview.
Hydroxycitronellal
RESTRICTION · CAS 107-75-5
Category 4 — fine fragrance: 2.1% 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 | 0.38% in the finished consumer product |
|---|---|
| Category 2 | 0.11% in the finished consumer product |
| Category 3 | 2.3% in the finished consumer product |
| Category 4 | 2.1% in the finished consumer product |
| Category 5A | 0.53% in the finished consumer product |
| Category 5B | 0.53% in the finished consumer product |
| Category 5C | 0.53% in the finished consumer product |
| Category 5D | 0.18% in the finished consumer product |
| Category 6 | 1.2% in the finished consumer product |
| Category 7A | 1.6% in the finished consumer product |
| Category 7B | 1.6% in the finished consumer product |
| Category 8 | 0.18% in the finished consumer product |
| Category 9 | 4.1% in the finished consumer product |
| Category 10A | 0.78% in the finished consumer product |
| Category 10B | 7.8% in the finished consumer product |
| Category 11A | 0.18% in the finished consumer product |
| Category 11B | 0.18% 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.Petals and peel
With bergamot and a light citrus ideaExplore a brighter version of the floral character using a simple citrus counterpoint. Compare it with the unchanged flower accord and note whether the citrus frames the bloom or becomes the main subject of the sketch.
Stem and blossom
With geranium and leafy notesSketch the flower with a greener setting, keeping leaf and blossom as distinct ideas. Compare a clean floral reference with the greener version to decide how much of the imagined stem and garden belongs in the composition.
Petals over wood
With a transparent wood directionPlace the floral material against a spare wood backdrop and follow the balance through the evaluation. Try a softer wood variation separately, then choose whether your flower needs an open, airy setting or a smoother, more enveloping frame.







suson.teodor (verified owner) –
Fresh, floral muguet note — smooth and elegant. Excellent quality and fast delivery.