Is PRENOL safe to use in EU cosmetics?

PRENOL is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Always verify against the current official CosIng database before formulating.

What other records share CAS 556-82-1?

CAS 556-82-1 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.

How do I check if my formula contains PRENOL?

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

InventoryRef 4093002/03/2011

PRENOL

3-Methylbut-2-en-1-ol

PRENOL 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 556-82-1

CAS 556-82-1PubChem CID 11173

3-Methyl-2-buten-1-OL

Prenol is a member of prenols and an alkenyl alcohol. — ChEBI

IUPAC name: 3-methylbut-2-en-1-ol

Molecular formula: C5H10O
Molecular weight: 86.13 g/mol
Exact mass: 86.073164938 Da
XLogP3: 1.0
Topological polar surface area: 20.2 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

PrenolPrenyl alcohol2-Buten-1-ol, 3-methyl-3-Methyl-2-butenolDimethylallyl alcohol3-Methyl-2-butenyl alcoholFEMA No. 36472-methyl-2-buten-4-ol

16 more reported names

55MY0HM445NSC-158709CHEBI:16019RefChem:175877gamma,gamma-Dimethylallyl alcohol209-141-43,3-Dimethylallyl alcohol3-Methylcrotyl alcohol3-Methyl-2-butene-1-olbutenol methyl.gamma.,.gamma.-Dimethylallyl alcoholNSC 1587092-Butenol, 3-methyl3-methyl-but-2-en-1-olMethyl-3-but-2-en-1-olDimethylallylalcohol

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:16019
ChEMBL:CHEMBL3184952
EPA DTXSID:DTXSID2027206
PubMed:24254865
PubMed:22917856
PubMed:22700231
PubMed:22611397
PubMed:22305943
PubMed:22269867
PubMed:22206037
PubMed:22162874
PubMed:21912516
PubMed:21852975
PubMed:21595881
PubMed:21592396

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 PRENOL

INCI name

PRENOL

Description

3-Methylbut-2-en-1-ol

Record provenance

Inventory reference: 40930
Imported identity: PRENOL
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for PRENOL

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Key data

CAS

556-82-1

209-141-4

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

POLIANTHES TUBEROSA FLOWER OILPERFUMING

POLYGONUM MULTIFLORUM ROOT WATERFLAVOURING, FRAGRANCE, PERFUMING, SKIN CONDITIONING

PPG-2 METHYL ETHERPERFUMING, SOLVENT

PREGNADIENOLFRAGRANCE, PERFUMING

PRENYL ACETATEPERFUMING

PRENYL BENZOATEPERFUMING

PROPENYL P-CYMENEPERFUMING

PROPIONALDEHYDEPERFUMING

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 PRENOL appears in the CosIng inventory

The CosIng inventory lists PRENOL 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.

PRENOL 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

PRENOL 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, PRENOL carries the following function designation(s):

PERFUMING

CAS 556-82-1 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 PRENOL

This page reproduces the CosIng inventory entry for PRENOL 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 PRENOL 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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