什麼是β-蒎烯?

Beta-pinene, a bicyclic monoterpene, is the second most abundant component of resins produced by pine and other coniferous trees and is an organic compound found in plants. The most abundant is its isomer α-pinene. Both pinenes occur in nature as their (+)- and (-)-enantiomers. Image shows the (+)-enantiomer of β-pinene.

It is a colorless liquid, soluble in alcohol but insoluble in water. It has a woody green pine smell. This is one of the most abundant compounds released by forest trees. If oxidized in air, it is mainly the allyl product of the pine carveol and myrtenol families.

Pinene is the main component of turpentine, a solvent that was in its heyday as a thinner and cleaner for oil-based paints. It is also used in varnishes and as a raw material for the synthesis of useful organic compounds.

Turpentine is mentioned in the chemical literature as early as 1875 in U.S. Patent 162,394, where Archibald K. Lee of Galveston, Texas, used turpentine in a modified process to dissolve "bitumen" (a form of asphalt). dissolved form). In 1893, Walter E. Rohner of New York City was awarded $498,961 for his use in "wood polish."

β-Pinene itself was first discovered in 1896 by the famous German chemist Adolf von Baeyer, who won the 1905 Nobel Prize in Chemistry, in a detailed paper on the origin of terpenes. Luciferin, phenolphthalein, and indigo. Bayer also developed

source

Many plants from many plant families contain this compound, including:

  • cumin
  • hops
  • pine
  • yellow skin
  • marijuana

β-Pinene Overview

CAS registration number 127-91-3
SciFinder nomenclature Bicyclo[3.1.1]heptane, 6,6-dimethyl-2-methylene-
empirical formula C 10 H 16
Molar mass 136.23 g/mol
appearance colorless liquid
boiling point 166℃
water soluble Insoluble

Beta-pinene hazard information*

Levels of danger** GHS Code and Hazard Statements
Flammable liquids, Category 3 H226—Flammable liquids and vapors
Acute toxicity, oral, Category 4 H302—Harmful if swallowed
Aspiration hazard, Category 1 H304 - May be fatal if swallowed and enters respiratory tract
Acute toxicity, dermal, Category 4 H312—Harmful in contact with skin
Skin corrosion/irritation, Category 2 H315—Causes skin irritation
Sensitization, Skin, Category 1 H317—May cause allergic skin reactions
Serious eye damage/eye irritation, Category 2A H319 - Causes serious eye irritation
Acute toxicity, inhalation, Category 4 H332—Harmful if inhaled
Specific target organ toxicity, single exposure, respiratory tract irritation, Category 3 H335—May cause respiratory tract irritation
Short-term (acute) aquatic hazard, Category 1 H400 - Highly toxic to aquatic life
Long-term (chronic) aquatic hazard, Category 1 H410 - Extremely toxic to aquatic life with long lasting effects

use

Beta-pinene is used in fragrances and essential oils. It is also used in the production of other aromatic compounds such as myrcene and nerolidol.

Review

All comments are moderated before being published