p-Menth-1-en-8-ol Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R10:Entzündlich.
R38:Reizt die Haut.
S-S?tze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S37:Geeignete Schutzhandschuhe tragen.
Occurrence
Reported found in more than 150 derivatives from leaves, herbs and flowers; the d-, l- and dl-isomers are known: the d-form is found in the essential oils from Cupressaceae in general; also in the oils of Elettaria cardamomum, star anise, marjoram, clary sage, neroli and others. The l-form is found in Satureia montana, lavandin, cajeput, lime, lemon, cinnamon leaves and the distillates from Pinaceae (with exception of Pinus silvestris, which contains d-terpineol together with racemic form); likewise, Nectandra elaiophora (wood) and petitgrain bigarade. The racemic form is found in cajenne linalool, Thymus caespititius, cajeput, Eucalyptus globulus; mixed with the l-form it is found in petitgrain; a nondefined form of terpineol has been reported in the bitter orange. Reported found in over 260 natural sources including apple, apple juice, apricot, sweet and sour cherry, citrus peel oils and juices, orange, lemon, etc.
Verwenden
A naturally-occuring monoterpene alcohol.Alpha-terpineol is used as an antioxidant, antiseptic, antihypernociception and anti-inflammatory. It is also used as a solvent. It is an important ingredient of pine oil disinfectants. Further, it is used as a fragrance in perfumes, fat denaturant for soap production and synthetic flavoring agent.
synthetische
Although α-terpineol occurs in many essential oils, only small
quantities are isolated, for example, by fractional distillation of pine oils.
A common industrial method of α-terpineol synthesis consists of the hydration
of α-pinene or turpentine oil with aqueous mineral acids to give crystalline
cis-terpin hydrate (mp 117 °C), followed by partial dehydration to α-terpineol.
Suitable catalysts are weak acids or acid-activated silica gel.
Selective conversion of pinene, 3-carene, and limonene or dipentene to terpineol,
without terpin hydrate formation is also used. Addition of organic acids (weak
acids require catalytic amounts of mineral acids) produces terpinyl esters, which
are subsequently hydrolyzed to terpineol, sometimes in situ.
Definition
ChEBI: A terpineol that is propan-2-ol substituted by a 4-methylcyclohex-3-en-1-yl group at position 2.
Allgemeine Beschreibung
α-Terpineol is a monoterpene alcohol. It is one of the components responsible for the antifungal activity of
Melaleuca alternifolia (tea tree) essential oil. The reaction rate constant of α-terpineol with OH radical and ozone was found to be (1.9±0.5)×10
-10cm
3 molecule
-1s
-1 and (3.0±0.2)×10
-16cm
3 molecule
-1s
-1, respectively.
p-Menth-1-en-8-ol Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
