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ALPHA-PINENE

ALPHA-PINENE structure

CAS No:
2437-95-8
Formula:
C10H16
Chemical Name:
ALPHA-PINENE
Synonyms:
DL-A-PINENE;CYCLIC DEXADIENE;FEMA 2902;BICYCLO [3.1.1] HEPT-2-ENE, 2,6,6-TRIMETHYL;4,7,7-trimethylbicyclo[3.1.1]hept-3-ene;beta-PINENE, 90% +;DL-α-Pinene;Bicyclo[3.1.1]hept-2-ene,2
Categories:
Food Additives > Acidity Regulators

Description

Withheld

ChEBI: (-)-alpha-pinene is an alpha-pinene. It is an enantiomer of a (+)-alpha-pinene.

Alpha-pinene appears as a clear colorless liquid with a turpentine odor. Flash point 91 °F. Less dense than water and insoluble in water. Vapors are heavier than air. Used as a solvent.

ALPHA-PINENE Basic Attributes

Molecular Weight：

136.23

Exact Mass：

136.23

EC Number：

219-445-9

HScode：

29021910

Characteristics

PSA：

XLogP3：

4.83

Appearance：

Liquid

Density：

0.858 g/mL at 25 °C(lit.)

Melting Point：

-55 °C

Boiling Point：

155-156 °C(lit.)

Flash Point：

90 °F

Refractive Index：

n20/D1.465(lit.)

Water Solubility：

In water, 2.49 mg/L at 25 deg C

Storage Conditions：

Keep container closed. Keep away from heat, sparks, and open flame.

Vapor Pressure：

4.75 mm Hg at 25 deg C

Vapor Density：

4.7 (Air = 1)

Safety Information

Packing level：

III

Hazard category：

Transport codes：

UN 2368 3/PG 3

wgk germany：

hazard class code：

Xi,N

safety instructions：

26-36/37-61

RTECS Number：

DT7000000

Marks：

Xi,N

Stability/Shelf Life：

Stable. Flammable. Incompatible with strong oxidizing agents.

Precautionary statement(s)：

P264, P280, P302+P352, P321, P332+P313, P362

Hazard Statements：

10-36/37/38-43-50

RIDADR：

UN 2368

Exposure Prevention：

Alpha-pinene is the major constituent of turpentine (about 80%). It exists in levogyre form in European turpentine and in dextrogyre form in turpentine found in North-Americans. Sensitization occurs mainly in painters, polishers, and varnishers, and in those in the perfume and in the ceramics industry.

ALPHA-PINENE Use and Manufacturing

Uses

Used in the synthesis of linalool, nerol, geraniol, myrcenol and its esters, novelol, novelyl acetate, citral, ionone, citronellol and aldehydes, hydroxycitronellal and its esters , New lily of the valley aldehyde, new lily of the valley nitrile, dragon ketone, terpene resin, etc. It is an important raw material for synthetic fragrance and essence.

β-Pinene is also used in flavor compositions, partly as ingredient in artificial Lemon and Nutmeg oils, partly as component of such type flavors. The concentration in the finished product will be about 15 to 150 ppm. alpha-Pinene has a more balsamic taste, while be~a-Pinene, less suitable for flavors, has a dry-woody character.

Production

beta-pinene can be produced 1) by isolation from American Turpentine (minor component). 2) it is also possible to convert alpha-Pinene into bera-isomer.

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