Flavors & Fragrances
REACH
L-Alpha-Pinene
CAS Number
7785-26-4
EC Number
232-077-3
FEMA Number
FEMA 2902
What is L-Alpha-Pinene?
L-Alpha-Pinene (CAS 7785-26-4), also known as (-)-α-pinene, is the levorotatory enantiomer of alpha-pinene, derived primarily from turpentine fractions of coniferous trees. FEMA 2902.
Where is L-Alpha-Pinene used?
- Coatings and printing inks: renewable solvent carrier supporting resin dissolution and controlled evaporation
- Adhesives and sealants: reactive diluent and terpene resin precursor
- Flavor and fragrance: fresh, piney, coniferous character for fine fragrances, household products and food flavoring systems
- Personal care: aerosol sprays, shaving preparations and scented cosmetics
- It functions as a bio-based solvent and fragrance ingredient in industrial and consumer product manufacturing.
Good to know: Its specific optical activity matters for consistent polymer performance. Often selected over petrochemical alternatives to meet sustainability goals.
Commercial specifications
- Clear, mobile liquid in drum and IBC quantities
- High-purity optical isomer grades for enantiomeric excess requirements
Other Names (Synonyms)
(-)-α-pinene|(1S,5S)-2,6,6-trimethylbicyclo[3.1.1]hept-2-ene|(-)-alpha-pinene
What are the physical properties of L-Alpha-Pinene?
Melting Point -61 °C
Boiling Point 157 °C
Density 0.849595 g/cm³ @ Temp: 30.00 °C
Flash Point 90 °F
Appearance clear colourless liquid
Color Clear colorless
Odor at 10.00 % in dipropylene glycol. sharp warm resinous fresh pine
Form Liquid
Water Solubility INSOLUBLE
Vapor Pressure ~3 mm Hg ( 20 °C)
Refractive Index n 20/D 1.466
Log P 4.48 at 37℃
How is L-Alpha-Pinene classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard
Hazard Statements
H226 Flammable liquid and vapor
H302 Harmful if swallowed
H304 May be fatal if swallowed and enters airways
H315 Causes skin irritation
Precautionary Statements
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
Which trade and regulatory codes apply to L-Alpha-Pinene?
HS Code 29021910
UN Number 2368
ADR Class 3
Packing Group III
Storage Class 3 - Flammable liquids
WGK (Germany) 1