alpha-terpineol

CAS Number
98-55-5
EC Number
202-680-6
FEMA Number
FEMA 3045

What is alpha-terpineol?

Alpha-terpineol (CAS 98-55-5), also marketed as Terpineol, is a naturally derived monocyclic monoterpene alcohol used as a fragrance ingredient, flavor component, and solvent carrier in personal care and pharmaceutical manufacturing.

Where is alpha-terpineol used?

  • Personal care: perfumes, soaps, lotions and hair care products, contributing a fresh floral character and enhancing penetration of active ingredients through the skin
  • Fragrance: building block for lily-of-the-valley and lilac accords in fine fragrance and household product lines
  • Pharmaceuticals: solvent and carrier improving delivery
  • It helps the dispersibility of active compounds in topical preparations.
  • Flavor: subtle floral-citrus notes in food and beverage systems at low use levels

Good to know: FEMA 3045 status confirms its recognized use in flavoring applications.

Commercial specifications

  • Fragrance-grade and food-grade specifications; food-grade conforms to FCC standards for safety and purity
  • Bulk supply in drums and IBCs; smaller packaging for laboratory and development use

Other Names (Synonyms)

Terpineol schlechthin|Terpenol|Lily of valley|L-alpha-Terpineol|alpha,alpha,4-trimethyl-3-cyclohexene-1-methanol|alpha-Terpinol|alpha-Terpineole|alpha-Terpinenol

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What are the physical properties of alpha-terpineol?

Melting Point 35-40 °C
Boiling Point 218-221 °C @ Press: 764 Torr
Density 0.935 g/cm³ @ Temp: 20 °C
Flash Point 90 °C
Appearance clear colorless to slightly yellow liquid
Color Clear colorless
Odor at 100.00 %. pine terpene lilac citrus woody floral
Form Liquid After Melting
Water Solubility negligible
Vapor Pressure 6.48Pa at 23℃
Refractive Index 1.482-1.485
Log P 2.6 at 30℃

How is alpha-terpineol classified and handled safely? Learn More

Warning
GHS07· Irritant

Hazard Statements

H227 Combustible liquid
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation

Precautionary Statements

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.

Which trade and regulatory codes apply to alpha-terpineol?

HS Code 29061400
UN Number 1230
Packing Group II
Storage Class 10 - Combustible liquids
WGK (Germany) 1
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