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Synthetic aroma chemicals

alpha-Terpineol

Also known as 2-(4-methylcyclohex-3-en-1-yl)propan-2-ol, p-Menth-1-en-8-ol, 1-p-Menthen-8-ol

CAS 98-55-5Formula C10H18OMolar mass 154.25 g/molEC 202-680-6
GHS signal word: Warning. Pictograms: Harmful or irritant 73 suppliers listed
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alpha-Terpineol chemical structure, C10H18O, CAS 98-55-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless solid
Melting point
35 to 40
Boiling point
218 to 221
Density
0.935 at 20 °C/20 °C
Solubility
In water, 7100 mg/L at 25 °C
HS code
290619
Category
Synthetic aroma chemicals
Illustrative photo, a white jumbo bulk bag of powder in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is alpha-Terpineol?

Plain description, key identifiers and synonyms

Alpha-terpineol is a terpineol that is propan-2-ol substituted by a 4-methylcyclohex-3-en-1-yl group at position 2. It has a role as a plant metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-(4-methylcyclohex-3-en-1-yl)propan-2-ol
CAS number
98-55-5 CAS number cross-checkedOther or deprecated CAS: 10482-56-1, 8006-39-1
EC numbers
202-680-6, 219-448-5, 232-268-1, 682-088-6, 701-188-3
Molecular formula
C10H18O
UNII
21334LVV8W, R53Q4ZWC99
MDL number
MFCD00001557, MFCD00166983
INCI name
TERPINEOL
InChIKey
WUOACPNHFRMFPN-UHFFFAOYSA-N
InChI
InChI=1S/C10H18O/c1-8-4-6-9(7-5-8)10(2,3)11/h4,9,11H,5-7H2,1-3H3
SMILES (canonical and isomeric)
CC1=CCC(CC1)C(C)(C)O

Synonyms

  • 2-(4-methylcyclohex-3-en-1-yl)propan-2-ol
  • p-Menth-1-en-8-ol
  • 1-p-Menthen-8-ol
  • Terpineol 350
  • 1-Menthene-8-ol
  • alpha-Terpinenol
  • Terpenol
  • Terpineol schlechthin
  • Carvomenthenol
  • alpha,alpha,4-Trimethyl-3-cyclohexene-1-methanol
  • 1-Methyl-4-isopropyl-1-cyclohexen-8-ol
  • 2-(4-Methyl-3-cyclohexenyl)-2-propanol
  • PC 593
  • 1-Methyl-4-isopropyl-1-cyclohexene-8-ol
  • 3-Cyclohexene-1-methanol, alpha,alpha,4-trimethyl-
  • alphaTERPINEOL
  • 3-cyclohexene-1-methanol, alpha, alpha, 4-trimethyl-
  • Terpineol
  • dl-alpha-Terpineol
  • Terpineols
  • a-Terpineol
  • Alfa-terpineol
  • 1-alpha-terpineol
  • Terpilenol, alpha-
  • Terpin monohydrate impurity a
Show all 35 synonyms
  • Terpineol, mixture of isomers
  • alpha-Terpinol
  • 3-Cyclohexene-1-methanol, alpha,alpha4-trimethyl-
  • Terpene alcohol
  • alpha-Terpineol, analytical standard
  • alpha-Terpineol (natural)
  • 3-Cyclohexene-1-methanol,alpha4-trimethyl-
  • (S)-p-Menth-1-en-8-ol
  • alpha-terpeneol
  • alpha-terpeniol

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless solidexp.
Odour
Floral, lilacexp.
Taste
Lime (distilled)exp.
Melting point
35 to 40exp.
Boiling point
218 to 221exp.
Density
0.935 at 20 °C/20 °Cexp.
Solubility
In water, 7100 mg/L at 25 °Cexp.
Vapour pressure
VP: 5 mm Hg at 80 to 81 mm Hg /L-alpha-Terpineol/exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
154.25 g/molcalc.
Exact mass
154.1358 Dacalc.
LogP (octanol/water)
2.5calc.
Topological polar surface area
20.23 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
11calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.8calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1=CCCCC1

C1=CCCCC1

1 ring, 6 atoms, the Cyclohexene ring system.

5,167 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

alpha-Terpineol suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 73 suppliers
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Where suppliers are based

73 suppliers in 15 countries

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alpha-Terpineol price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.".

Terpineol with its typical lilac odor is one of the most frequently used fragrance compounds.

Perfumes, denaturing fats for soap manufacture.

Industrial uses: Solvent, Fragrance, Other, Intermediates, Flavoring and nutrient, Cleaning agent.

Consumer uses: Fragrance, Solvent.

Use classes: Cosmetics.

Cosmetic ingredient, INCI name TERPINEOL(fragrance, perfuming)

Roles

  • eukaryotic metabolite
  • metabolite
  • plant metabolite

Functional uses

  • Deodorizer
  • Dye
  • Flavouring and nutrient
  • Fragrance
  • Solubility enhancer
  • Solvent

Cosmetic functions

  • Fragrance
  • Perfuming

How it is made

A common industrial method of alpha-terpineol synthesis consists of the hydration of alpha-pinene or turpentine oil with aqueous mineral acids to give crystalline cis-terpin hydrate (mp 117 °C), followed by partial dehydration to alpha-terpineol. Suitable catalysts are weak acids or acid-activated silica gel.

Isolation of d-alpha-terpineol from petitgrain oil, ... isolation from l-alpha-terpineol from long leaf pine oil, isolation of dl-alpha-terpineol from cajeput oil.

Extraction of essential oils, fractional distillation of pine oils, wood processing industry.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex III, restricted in cosmetics
    Name: Terpineol, Ref no: 343, Annex ref: III/343

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code alpha-Terpineol is traded under.

HS 2906.19Indicative HS code

Cyclanic, cyclenic or cycloterpenic, other

World exports in 2024
$613M
+18.7% vs 2023, imports $606M
2019 to 2024
Top exporters
  1. China34.2%
  2. India * partner reported10.1%
  3. Germany9.5%
Top importers
  1. United States19.8%
  2. Germany9.0%
  3. India * partner reported8.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for alpha-Terpineol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about alpha-Terpineol, based on the data on this page

What is alpha-Terpineol?

Alpha-terpineol is a terpineol that is propan-2-ol substituted by a 4-methylcyclohex-3-en-1-yl group at position 2. It has a role as a plant metabolite.

What is the CAS number of alpha-Terpineol?

The CAS registry number of alpha-Terpineol is 98-55-5. Other or deprecated CAS numbers: 10482-56-1, 8006-39-1.

What is the molecular formula and weight of alpha-Terpineol?

The molecular formula of alpha-Terpineol is C10H18O and its molar mass is 154.25 g/mol.

What is alpha-Terpineol used for?

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.". Terpineol with its typical lilac odor is one of the most frequently used fragrance compounds. Perfumes, denaturing fats for soap manufacture.

Is alpha-Terpineol hazardous?

alpha-Terpineol carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of alpha-Terpineol?

alpha-Terpineol is usually classified under HS code 290619 (Cyclanic, cyclenic or cycloterpenic, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy alpha-Terpineol?

CompoundList lists 73 suppliers of alpha-Terpineol in China, United States, India, Japan and 11 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy alpha-Terpineol in India?

4 suppliers in India list alpha-Terpineol on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of alpha-Terpineol?

Suppliers quote alpha-Terpineol on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle alpha-Terpineol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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