3,4-Dihydroxyzimtsure Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R40:Verdacht auf krebserzeugende Wirkung.
R63:Kann das Kind im Mutterleib möglicherweise schädigen.
R68:Irreversibler Schaden möglich.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
Caffeic acid is abundant in the whole plant of Solidago decurrens Lour. (Yi Zhi
Huang Hua), fruit of Crataegus pinnatifida Bge. var. major N.E.Br. (Shan Li
Hong), Salix myrtillacea Anderss. (Po Liu), rhizome of Cimicifuga foetida L., rhizome of Polypodiaceae Polypodium vulgare L. (Ou Ya Shui Long Gu), peel of
Rutaceae Citrus limonum (Ning Meng), the whole plant of Polygonaceae Polygonum
aviculare L. (Pian Xu), root of Valeriana officinalis L. (Xie Cao), the whole plant of
Thymus mongolicus Ronn (She Xiang), leaves of Eucommia ulmoides (Du Zhong),
and other herbal plants. It is a kind of polyhydroxy styrene acid, with the general
chemical properties of phenolic acid. It is easily oxidized for the reason of the unsaturated double bonds, particularly unstable in alkaline solution
Caffeic acid has both cis and trans isomers, and the two isomers of caffeic acid
have a mutual transformation in plants, which may regulate some important physiological process. Caffeic acid exists in plants in the main form of complexes; free
state accounts for a few proportion.
Chemische Eigenschaften
Light yellow to greenish-yellow powder
Physikalische Eigenschaften
Appearance: yellow crystal. The crystal from the concentrated solution does not
contain crystal water, and the crystal from the dilute solution contains one molecule
crystal water. Melting point: 223?225?°C. Solubility: It is slightly soluble in cold
water but soluble in hot water, cold ethanol, and ethyl acetate. The basic solution is
orange-red. Ferric chloride solution was dark green.
Verwenden
Caffeic Acid is a constituent of plants, probably occurs in plants only in conjugated forms. Caffeic acid is found in all plants because it is a key intermediate in the biosynthesis of lignin, one of
the principal sources of biomass. Caffeic acid is one of the main natural phenols in argan oi.
Indications
It is used for preventing or stopping bleeding during surgery, as well as hemostasis
in the department of medicine, obstetrics and gynecology, etc. It is also used for
various causes of neutropenia and thrombocytopenia.
Allgemeine Beschreibung
Yellow prisms or plates (from chloroform or ligroin) or pale yellow granules. Alkaline solutions turn from yellow to orange.
Air & Water Reaktionen
Insoluble in water.
Health Hazard
ACUTE/CHRONIC HAZARDS: When heated to decomposition Caffeic acid emits acrid smoke and fumes.
Brandgefahr
Flash point data for Caffeic acid are not available; however, Caffeic acid is probably combustible.
läuterung methode
Recrystallise this antioxidant from water. [Beilstein 10 IV 1776.]
3,4-Dihydroxyzimtsure Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Cyclohexanecarboxylic acid, 3-[[(2E)-3-(3,4-dihydroxyphenyl)-1-oxo-2-propen-1-yl]oxy]-1,4,5-trihydroxy-
1,3,4,5-Tetrahydroxycyclohexancarbonsure
(E)-methyl 3-(benzo[d][1,3]dioxol-5-yl)acrylate
3,4-Dihydroxybenzaldehyd
7,8-Dihydroxycumarin
Downstream Produkte
