Molecular structure of Farnesol (CAS NO.4602-84-0) is:

Product Name: Farnesol
CAS Registry Number: 4602-84-0
IUPAC Name: (2E,6E)-3,7,11-trimethyldodeca-2,6,10-trien-1-ol
Molecular Weight: 222.36634 [g/mol]
Molecular Formula: C₁₅H₂₆O
XLogP3-AA: 4.8
H-Bond Donor: 1
H-Bond Acceptor: 1 
EINECS: 225-004-1
Refractive index: n20/D 1.490(lit.)
Storage temp.: -20°C
Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
Surface Tension: 30.3 dyne/cm
Density: 0.875 g/cm³
Flash Point: 112.5 °C
Enthalpy of Vaporization: 60.62 kJ/mol
Boiling Point: 283.4 °C at 760 mmHg
Vapour Pressure: 0.00037 mmHg at 25°C
Product Categories: Biochemistry;Terpenes;Terpenes (Others)

 Farnesol (CAS NO.4602-84-0) is from a flower extract with a long history of use in perfumery. The pure substance farnesol was named (ca. 1900-1905) from the type species Acacia farnesiana, the Farnese acacia, the flowers of which provided it commercially, as a floral essence. This particular acacia species in turn is named after Odoardo Cardinal Farnese (1573-1626) of the notable Italian Farnese family which (from 1550 though the 17th century) maintained some of the first private European botanical gardens in the Farnese gardens in Rome. The addition of the -ol ending results from it being chemically an alcohol.The plant itself was brought to the Farnese gardens from the Caribbean and Central America, where it originates.

 Farnesol (CAS NO.4602-84-0) is the building block of most (possibly all) acyclic sesquiterpenoids and is an important starting compound for organic synthesis. It is used in perfumery to emphasize the odors of sweet floral perfumes. It is especially used in lilac perfumes.It is a natural pesticide for mites and is a pheromone for several other insects.

Hazard Codes: Xi
Safety Statements: 24/25-22 
R24/25:Toxic in contact with skin and if swallowed. 
R22:Harmful if swallowed.
WGK Germany: 3
RTECS: JR4979000
F: 8
Hazard Note: Irritant

 Farnesol , its cas register number is 4602-84-0. It also can be called 2,6,10-Dodecatrien-1-ol, 3,7,11-trimethyl- ; 3,7,11-Trimethyl-2,6,10-dodecatrien-1-ol ; 3,7,11-Trimethyl-2,6,10-dodecatrienol ; Farnesyl alcohol .It is a colorless liquid with a delicate floral odor. It is a natural organic compound which is an acyclic sesquiterpene alcohol found as a colorless liquid. It is insoluble in water, but miscible with oils. It is the alcohol derivative of Farnesol Pyrophosphate. It is the building block of most (possibly all) acyclic sesquiterpenoids and is an important starting compound for organic synthesis.It is present in many essential oils such as citronella, neroli, cyclamen, lemon grass, tuberose, rose, musk, balsam and tolu. It is used in perfumery to emphasize the odors of sweet floral perfumes. Its method of action for enhancing perfume scent is as a co-solvent that regulates the volatility of the odorants. It is especially used in lilac perfumes.It is a natural pesticide for mites and is a pheromone for several other insects.