MF: C₁₀H₁₆
MW: 136.23
EINECS: 201-291-9
Flash Point: 90 °F
Melting Point: -55 °C 
refractive index: n20/D 1.465(lit.)
Density: 0.858 g/mL at 25 °C(lit.)
Boiling Point: 157.9 °C at 760 mmHg 
Appearance: Colorless transparent liquid
IUPAC Name: 4,7,7-Trimethylbicyclo[3.1.1]hept-3-ene
Solubility: Slightly soluble in water, soluble in alcohol, ether, chloroform and so the majority of organic solvents.
Synonyms: Dl-alpha-pinene ; Dl-a-pinene ; Cyclic dexadiene ; FEMA 2902 ; a-Pinene ; Bicyclo [3.1.1] hept-2-ene, 2,6,6-trimethyl ; Acintene a ; alfa-Pinene
Following is the molecular structure of alfa-Pinene (2437-95-8):

Safety Information of alfa-Pinene (2437-95-8):
Hazard Codes: Xi,N
Xi: IrritantN: Dangerous for the environment
Risk Statements: 10-36/37/38-43-50
10: Flammable 
36/37/38: Irritating to eyes, respiratory system and skin 
43: May cause sensitization by skin contact 
50: Very Toxic to aquatic organisms 
Safety Statements: 26-36/37-61
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37: Wear suitable protective clothing and gloves 
61: Avoid release to the environment. Refer to special instructions safety data sheet 
RIDADR: UN 2368 3/PG 3
WGK Germany: 1
RTECS: DT7000000

 α-Pinene (CAS NO.2437-95-8) is an organic compound of the terpene class, one of two isomers of pinene. It is an alkene and it contains a reactive four-membered ring. It is found in the oils of many species of many coniferous trees, notably the pine. It is also found in the essential oil of rosemary (Rosmarinus officinalis). Both enantiomers are known in nature; 1S,5S- or (−)-α-pinene is more common in European pines, whereas the 1R,5R- or (+)-α-isomer is more common in North America. The racemic mixture is present in some oils such as eucalyptus oil.