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Synthetic aroma chemicals

Terpinolene

Also known as Isoterpinene, Terpinolen, alpha-Terpinolene

CAS 586-62-9Formula C10H16Molar mass 136.24 g/molEC 209-578-0
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant, Serious health hazard, Hazardous to the environment 44 suppliers listed
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Terpinolene chemical structure, C10H16, CAS 586-62-9
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Water-white to pale amber liquid
Boiling point
187 °C
Density
0.8632 g/cm³ at 15 °C
Flash point
64 °C
Solubility
In water, 9.5 mg/L at 25 °C
HS code
290219
Category
Synthetic aroma chemicals
UN number
UN 2541
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Terpinolene?

Plain description, key identifiers and synonyms

Terpinolene is a p-menthadiene with double bonds at positions 1 and 4(8). It has a role as a volatile oil component, a sedative, an insect repellent and a plant metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-methyl-4-propan-2-ylidenecyclohexene
CAS number
586-62-9 CAS number cross-checked
EC numbers
209-578-0, 935-778-9
Molecular formula
C10H16
UNII
N9830X5KSL
MDL number
MFCD00049191
INCI name
TERPINOLENE
InChIKey
MOYAFQVGZZPNRA-UHFFFAOYSA-N
InChI
InChI=1S/C10H16/c1-8(2)10-6-4-9(3)5-7-10/h4H,5-7H2,1-3H3
SMILES (canonical and isomeric)
CC1=CCC(=C(C)C)CC1

Synonyms

  • Isoterpinene
  • Terpinolen
  • alpha-Terpinolene
  • p-Mentha-1,4(8)-diene
  • 4-Isopropylidene-1-methylcyclohexene
  • 1,4(8)-p-Menthadiene
  • Nofmer TP
  • Tereben
  • Cyclohexene, 1-methyl-4-(1-methylethylidene)-
  • 1,4(8)-Terpadiene
  • 1-Methyl-4-(1-methylethylidene)cyclohexene
  • 1-Methyl-4-isopropylidene-1-cyclohexene
  • 1-methyl-4-propan-2-ylidenecyclohexene
  • 1-methyl-4-(propan-2-ylidene)cyclohex-1-ene
  • 1-Methyl-4-(1-methylethylidene)-1-cyclohexene
  • 1-methyl-4-(propan-2-ylidene)cyclohexene
  • 1-methyl-4-(propan-2-ylidene)cyclohexene p-mentha-1,4(8)-diene
  • p-Menth-1,4(8)-diene
  • 4-isopropylidene-1-methyl-cyclohexene
  • gamma-Terpinolene
  • Terpinolene (>85%)
  • 1-methyl-4-(1-methylethylidene)-cyclohexene
  • Cyclohexene, 3-methyl-6-(1-methylethylidene)- (9CI)
  • 1-methyl-4-[1-methylethylidene]-cyclohexene
  • p-Meth-1-en-8-yl-formate
Show all 34 synonyms
  • alpha-terpynolene
  • alpha-terpinenolene
  • alpha -Terpinolene
  • Terpinolene Natural
  • Terpinolene 95 PF
  • alpha- Terpinolen
  • Terpinolene, >=90%
  • TERPINOLENE with GC
  • Terpinolene, analytical standard

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
Water-white to pale amber liquidexp.
Odour
SWEET, PINE ODORexp.
Taste
SOMEWHAT SWEET, CITRUS FLAVORexp.
Boiling point
187 °Cexp.
Density
0.8632 g/cm³ at 15 °Cexp.
Flash point
64 °Cexp.
Solubility
In water, 9.5 mg/L at 25 °Cexp.
Vapour pressure
0.74 mm Hg at 25 °Cexp.

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
136.24 g/molcalc.
Exact mass
136.1252 Dacalc.
LogP (octanol/water)
3.45calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.6calc.
Formal charge
0calc.
Stereocentres
0calc.
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, C=C1CC=CCC1

C=C1CC=CCC1

1 ring, 7 atoms, the Cyclohexene, 4-methylene- ring system.

73 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H226Flammable liquid and vapour.
  • H304May be fatal if swallowed and enters airways.
  • H315Causes skin irritation.
  • H317May cause an allergic skin reaction.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (24)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P331Do not induce vomiting.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2541
Transport hazard class
3
Packing group
III

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

Terpinolene suppliers

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

All 44 suppliers
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Where suppliers are based

44 suppliers in 12 countries

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Terpinolene 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

Reported uses (ppm):

Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association, 1994) [Table#5518].

Solvent for resins, essential oils, manufacture of synthetic resins, synthetic flavors.

Used to improve the odor of industrial and household products.

Fragrance-eg, for perfumes & soaps.

Industrial uses: Other, Fragrance.

Consumer uses: Fragrance.

Cosmetic ingredient, INCI name TERPINOLENE(fragrance)

Roles

  • central nervous system depressant
  • central nervous system drug
  • eukaryotic metabolite
  • insect repellent
  • insecticide
  • metabolite
  • pesticide
  • pharmaceutical
  • plant metabolite
  • sedative
  • volatile oil component

Functional uses

  • Flavouring and nutrient
  • Fragrance
  • Solubility enhancer

Cosmetic functions

  • Fragrance

How it is made

Fractionation of wood turpentine.

Terpinolene used to be extracted by fractional distillation of wood turpentine. It is now produced by treating alpha-pinene with aqueous H3PO4 at 75 °C. It is preferable to distill terpinolene under vacuum to minimize the formation of polymeric products at elevated temperatures.

Limonene can be isomerized to terpinolene using liquid SO2 and a hydroperoxide catalyst (tert-butyl hydroperoxide (TBHP)). Another method uses a specially prepared ortho-titanic acid catalyst with a buffer, such as sodium acetate. A selectivity of ~70% is claimed at ~50% conversion when run at 150 °C for 4 hr.

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: Terpinolene, Ref no: 133, Annex ref: III/133

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 Terpinolene is traded under.

HS 2902.19Indicative HS code

Cyclanes, cyclenes and cycloterpenes, other

World exports in 2024
$979M
+24.3% vs 2023, imports $1B
2019 to 2024
Top exporters
  1. China23.4%
  2. United States20.6%
  3. Germany13.6%
Top importers
  1. India * partner reported9.9%
  2. United States9.8%
  3. South Korea9.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Terpinolene, based on the data on this page

What is Terpinolene?

Terpinolene is a p-menthadiene with double bonds at positions 1 and 4(8). It has a role as a volatile oil component, a sedative, an insect repellent and a plant metabolite.

What is the CAS number of Terpinolene?

The CAS registry number of Terpinolene is 586-62-9.

What is the molecular formula and weight of Terpinolene?

The molecular formula of Terpinolene is C10H16 and its molar mass is 136.24 g/mol.

What is Terpinolene used for?

Reported uses (ppm): Table: Reported uses (ppm): (Flavor and Extract Manufacturers' Association, 1994) [Table#5518]. Solvent for resins, essential oils, manufacture of synthetic resins, synthetic flavors. Used to improve the odor of industrial and household products. Fragrance-eg, for perfumes & soaps.

Is Terpinolene hazardous?

Terpinolene carries the GHS signal word "Danger". Main hazards: flammable liquid and vapour, may be fatal if swallowed and enters airways, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Terpinolene?

Terpinolene is usually classified under HS code 290219 (Cyclanes, cyclenes and cycloterpenes, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Terpinolene?

CompoundList lists 44 suppliers of Terpinolene in China, India, United States, Japan and 8 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Terpinolene in India?

10 suppliers in India list Terpinolene on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Terpinolene?

Suppliers quote Terpinolene 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 Terpinolene

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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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