Sulfurol D
Extremely Potent, Meaty, Sweet, Cooked, Nutty-Hazelnut, Animalic, Roasted, Creamy, Sulphurous
Supplied as 1% in TEC.
About this material
Sulfurol
CAS No: 137-00-8
Odour Description (decreasing): Extremely Potent, Meaty, Sweet, Cooked, Nutty-Hazelnut, Animalic, Roasted, Creamy, Sulphurous
Odour Strength: High
Usage: Effective from small traces through to 0.01%
Solvent: TEC to give a 1% solution of Sulphurol (Sulfurol)
Synonyms: 4-Methyl-5-thiazolylethanol, 4-Methyl-5-thiazoleethanol, 5-hydroxyethyl-4-methyl thiazole, Methyl-5-thiazole ethanol, Hemineurine
Name: 2-(4-methyl-1,3-thiazol-5-yl)ethan-1-ol / 4-methyl-5-(2-hydroxyethyl)thiazole
Molecular Formula: C₆H₉NOS
IFRA:
Scent character
Highlights from the material’s listed odour profile.
Note position
Heart note
Material character
A closer lookOdour strength
Listed qualitative strength
Tenacity / substantivity
Not listed
Fragrance development
Heart note
Illustrative note development · no measured evaporation data
Molecular identity
C6H9NOS
- Molecular weight
- 143.21 g/mol
- IUPAC name
- 2-(4-methyl-1,3-thiazol-5-yl)ethanol
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)
- 0.8
- Exact mass (Da)
- 143.04048508
- Monoisotopic mass (Da)
- 143.04048508
- Topological polar surface area (Ų)
- 61.4
- Complexity
- 89
- Formal charge
- 0
- Hydrogen bond donors
- 1
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 2
- Heavy atoms
- 9
- Isotope atoms
- 0
- Atom stereocentres
- 0
- Bond stereocentres
- 0
- Covalent units
- 1
- SMILES
- CC1=C(SC=N1)CCO
- InChI
- InChI=1S/C6H9NOS/c1-5-6(2-3-8)9-4-7-5/h4,8H,2-3H2,1H3
- InChIKey
- BKAWJIRCKVUVED-UHFFFAOYSA-N
Reference data checked 2026-10-27.
Structure of the named active material; product supplied at 1% in TEC.
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 undiluted material reference. These data refer to the named active material, not the complete supplied dilution. A raw-material IFRA ceiling is not a use level for this diluted product. The assessor must account for the actual concentration, carrier and all other formula contributions.
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
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.
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 | 137-00-8 |
|---|---|
| Odour description (decreasing) | Extremely Potent, Meaty, Sweet, Cooked, Nutty-Hazelnut, Animalic, Roasted, Creamy, Sulphurous |
| Odour strength | High |
| Perfumery use | Effective from small traces through to 0.01%Listed perfumery guidance; this is not an IFRA limit. |
| Solvent | TEC to give a 1% solution of Sulphurol (Sulfurol) |
| Physical state | Liquid |
| Synonyms | 4-Methyl-5-thiazolylethanol, 4-Methyl-5-thiazoleethanol, 5-hydroxyethyl-4-methyl thiazole, Methyl-5-thiazole ethanol, Hemineurine |
| Recorded name / preparation | 2-(4-methyl-1,3-thiazol-5-yl)ethan-1-ol / 4-methyl-5-(2-hydroxyethyl)thiazole |
| Named active molecular formula | C₆H₉NOS |
| IFRA document scope | Where an IFRA document is shared with the raw material, it refers to the raw, undiluted material. It is supplied as a reference for this diluted product; its stated limits are not limits for the supplied dilution. Check the document scope and assess the intended finished formulation. This notice does not confirm that a document is available. |
Safety & handling
Not Hazardous According To EC 1272/2008
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 undiluted material reference. These data refer to the named active material, not the complete supplied dilution. A raw-material IFRA ceiling is not a use level for this diluted product. The assessor must account for the actual concentration, carrier and all other formula contributions.
Source: 51st Amendment overview, held source checked 2026-10-21. Bundle 2026-10-27. Individual Standards prevail over the overview.
No direct IFRA overview entry matched the recorded CAS in this held dataset. This does not mean unrestricted use, absence of relevant Standards or compliance. Constituent restrictions may still apply.
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.Living petals
With a pared-back rose accordExplore a floral study that places the animalic character beside a recognisable rose. Keep a floral-only reference and compare the changing impression, looking for the point where an intriguing accent begins to obscure the flower.
Soft leather sketch
With leather and smooth wood notesUse a restrained leather direction as a setting for the material’s listed character. Compare a wood-focused version with a softer one, recording whether the result suggests worn texture, warmth or a contrast you would avoid.
Warmth in shadow
With amber and a musk directionTry an amber-and-musk setting as an alternative to the floral study. Evaluate the animalic contribution against a matching reference and allow the blend to develop before deciding whether the accent belongs in the final concept.




Stuart M. (verified owner) –
I’m yet to use this, but smells slightly sour so will have to find the right place in a formula.