What other records share CAS 115-18-4?

CAS 115-18-4 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.

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InventoryRef 4045702/03/2011

2-METHYL-3-BUTEN-2-OL

2-Methylbut-3-en-2-ol

2-METHYL-3-BUTEN-2-OL 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 115-18-4

CAS 115-18-4PubChem CID 8257

2-Methyl-3-buten-2-ol

3-hydroxy-3-methylbut-1-ene is a tertiary alcohol that is 3-methylbut-1-ene carrying a hydroxy substituent at position 3. It has a role as a pheromone, a fragrance, an animal metabolite and a plant metabolite. It is a tertiary alcohol and an olefinic compound. It derives from a hydride of a 3-methylbut-1-ene. — ChEBI

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

Molecular formula: C5H10O
Molecular weight: 86.13 g/mol
Exact mass: 86.073164938 Da
XLogP3: 0.8
Topological polar surface area: 20.2 Å²
Hydrogen-bond donors: 1
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

3-Buten-2-ol, 2-methyl-1,1-Dimethylallyl alcohol3-Hydroxy-3-methylbuteneDimethylvinylcarbinolDimethylvinylmethanolVinyldimethylcarbinol1,1-Dimethyl-2-propenol2-Methyl-2-hydroxy-3-butene

16 more reported names

2-Methyl-3-buten-2-yl alcoholalpha,alpha-Dimethylallyl alcoholSH64HE46L9NSC-15977RefChem:88074204-068-4Methylbutenol3-Methyl-1-buten-3-ol3-Hydroxy-3-methyl-1-buteneisoprenyl alcohol2-Methyl-3-butene-2-ol1,1-Dimethylallyl alchol1,1-Dimethyl-2-propanol3-Methyl-buten-(1)-ol-(3)CH2=CHC(CH3)2OHNSC 15977

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:132752
ChEMBL:CHEMBL4245903
EPA DTXSID:DTXSID3047471
PubMed:22849837
PubMed:22849588
PubMed:22815680
PubMed:22207146
PubMed:22194447
PubMed:22163027
PubMed:22162874
PubMed:21919524
PubMed:21853995
PubMed:21750948
PubMed:21749155
PubMed:21614617

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match8257

Attributed physical-property, hazard, environmental and use annotations.

Autoignition Temperature: 380 °C Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Boiling Point: 208.4 to 210.2 °F at 760 mmHg (USCG, 1999) Source: CAMEO Chemicals
Boiling Point: 97.00 to 99.00 °C. @ 760.00 mm Hg Source: Human Metabolome Database (HMDB)
Boiling Point: 97 °C Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Density: 0.824 (USCG, 1999) - Less dense than water; will float Source: CAMEO Chemicals
Density: 0.8 g/cm³ Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Density: Relative density of the vapour/air-mixture at 20 °C (air = 1): 1.06 Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Flash Point: 56 °F (USCG, 1999) Source: CAMEO Chemicals
Flash Point: 10 °C c.c. Source: ILO-WHO International Chemical Safety Cards (ICSCs)

LogP: 0.66 Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Melting Point: -28 °C Source: Human Metabolome Database (HMDB)
Melting Point: -28 °C Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Physical Description: Methyl butenol is a colorless liquid. (USCG, 1999) Source: CAMEO Chemicals
Physical Description: Colorless liquid; [CAMEO] Colorless liquid with an odor like alcohol; [Alfa Aesar MSDS] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Physical Description: Liquid Source: Human Metabolome Database (HMDB)
Physical Description: COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Solubility: 1000 mg/mL Source: Human Metabolome Database (HMDB)
Solubility: Solubility in water, g/100ml at 20 °C: 19 (good) Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Vapor Pressure: 23.5 [mmHg] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Vapor Pressure: Vapor pressure, kPa at 25 °C: 3.13 Source: ILO-WHO International Chemical Safety Cards (ICSCs)

Exposure Routes: The substance can be absorbed into the body by ingestion. Source: ILO-WHO International Chemical Safety Cards (ICSCs)

First Aid: INHALATION: Call for medical aid. Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.; EYES: Flush with copious amounts of water for at least 15 minutes.; SKIN: Wash with soap and copious amounts of water. (USCG, 1999) Source: CAMEO Chemicals

Note: This chemical does not meet GHS hazard criteria for 1.3% (22 of 1724) of reports. Source: European Chemicals Agency (ECHA)
Signal: Danger Source: European Chemicals Agency (ECHA)
GHS Hazard Statements: H225 (98.7%): Highly Flammable liquid and vapor [Danger Flammable liquids]; H302 (98.7%): Harmful if swallowed [Warning Acute toxicity, oral]; H319 (98.7%): Causes serious eye irritation [Warning Serious eye damage/eye irritation] Source: European Chemicals Agency (ECHA)
Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P264, P264+P265, P270, P280, P301+P317, P303+P361+P353, P305+P351+P338, P330, P337+P317, P370+P378, P403+P235, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
ECHA C&L Notifications Summary: Aggregated GHS information provided per 1724 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Reported as not meeting GHS hazard criteria per 22 of 1724 reports by companies.; There are 8 notifications provided by 1702 of 1724 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
Signal: Danger Source: NITE-CMC
GHS Hazard Statements: H225: Highly Flammable liquid and vapor [Danger Flammable liquids]; H302: Harmful if swallowed [Warning Acute toxicity, oral]; H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]; H361: Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity] Source: NITE-CMC
Precautionary Statement Codes: P203, P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P317, P303+P361+P353, P304+P340, P318, P319, P330, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: NITE-CMC

Sources/Uses: Narcotic, sleep-producing principle from hops. [ChemIDplus] Used as a flavoring agent; [FDA] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

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 2-METHYL-3-BUTEN-2-OL

INCI name

2-METHYL-3-BUTEN-2-OL

Description

2-Methylbut-3-en-2-ol

Record provenance

Inventory reference: 40457
Imported identity: 2-METHYL-3-BUTEN-2-OL
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for 2-METHYL-3-BUTEN-2-OL

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Key data

CAS

115-18-4

204-068-4

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Ingredients with overlapping formulation functions

2-METHYL-1,5-DIOXASPIROUNDECANEPERFUMING

2-METHYL-2-BUTENOLPERFUMING

2-METHYL-2-OCTANOLPERFUMING

2-METHYL-3-(1,7,7-TRIMETHYLBICYCLOHEPT-2-YLOXY)-PROPANOLPERFUMING

2-METHYL-3-OXOPROPOXY-PYRAN-4-ONEPERFUMING

2-METHYL-3-P-CRESYL-PROPIONALDEHYDEPERFUMING

2-METHYL-4-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)-2-BUTEN-1-OLPERFUMING

2-METHYL-4-(2,6,6-TRIMETHYL-1-CYCLOHEXENYL)-2-BUTENALPERFUMING

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 2-METHYL-3-BUTEN-2-OL appears in the CosIng inventory

The CosIng inventory lists 2-METHYL-3-BUTEN-2-OL 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.

2-METHYL-3-BUTEN-2-OL 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

2-METHYL-3-BUTEN-2-OL 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, 2-METHYL-3-BUTEN-2-OL carries the following function designation(s):

PERFUMING

CAS 115-18-4 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 2-METHYL-3-BUTEN-2-OL

This page reproduces the CosIng inventory entry for 2-METHYL-3-BUTEN-2-OL 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 2-METHYL-3-BUTEN-2-OL 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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Regulatory evidence by market

Chemical identity and properties

2-Methyl-3-buten-2-ol

Evidence from additional scientific databases

NIH PubChem PUG-View

Autoignition Temperature 1

Boiling Point 3

Density 3

Flash Point 2

LogP 1

Melting Point 2

Physical Description 4

Solubility 2

Vapor Pressure 2

Exposure Routes 1

First Aid 1

GHS Classification 8

Uses 1