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 Ų
- 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
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.