3, 4-dihydroxycinnamate Synonyms: Caffeic acid; 3,4-dihydroxybenzeneacrylicacid CAS: 331-39-5 EINECS: 206-361-2 Purity: 98% min. Packing: 25kg/cardboard drum. Brand: Nanjian (KOSHER Certificate) Characters: Light yellow to greenish-yellow powder. Soluble in water and ethanol. Insoluble in water. Usage: use as reagents in organic synthesis intermediates. Pharmacology: Antibacterial, antiviral, excitability, detoxification, blood coagulation. Constituent of plants, probably occurs in plants only in conjugated forms. Caffeic acid is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in Caffeic acid to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions. Cinnamic acid derives: Cinnamic acid, 4-Hydroxycinnamic acid, 4-Methoxycinnamic acid, 4-Fluorocinnamic acid, 3,4,5-Trimethoxycinnamic acid, 4-Methylcinnamic acid, 3-(trifluoromethyl)cinnamic acid, 4-Chlorocinnamic acid, 2-Chlorocinnamic acid, Hydrocinnamic acid, 4-Bromocinnamic acid, 3-Bromocinnamic acid, alpha-Methylcinnamic acid, 3,4-dihydroxycinnamate (Caffeic acid), Caffeic Acid Phenethyl Ester (CAPE), 4-Hydroxy-3-methoxycinnamic acid (Ferulic acid), Potassium cinnamate, etc. Cinnamic aldehyde derives: Cinnamaldehyde, alpha-Bromocinnamaldehyde, alpha-Methylcinnamaldehyde, alpha-Hexylcinnamaldehyde, alpha-Amylcinnamaldehyde, alpha-Chlorocinnamaldehyde, 3-Trifluorocinnamaldehyde, 4-Trifluorocinnamaldehyde, 3-Methylcinnamaldehyde, 2-Methylcinnamaldehyde, 4- Methylcinnamaldehyde, 2-Methoxycinnamaldehyde, 4-Methoxycinnamaldehyde, 4-Bromocinnamaldehyde, Cinnamaldehyde diethyl acetal, 3-Bromo-4-hydroxybenzaldehyde, etc. Cinnamate derives: Methyl Cinnamate, Ethyl Cinnamate, Polyvinyl Cinnamate, Butyl Cinnamate, Benzyl Cinnamate, Propyl Cinnamate, Cinnamyl Cinnamate, Amyl Cinnamate, Cinnamyl Formate, Octyl p-Methoxycinnamate (OMC), Ethyl p-Methylcinnamate, Isooctyl p-Methoxycinnamate, Isobutyl Cinnamate, Isopropyl Cinnamate, Isoamyl cinnamate, Phenethyl Cinnamate , Methyl 4-hydroxycinnamate, Methyl 4-Methylcinnamate, Benzyl 4-hydroxybenzoate, Cinnamyl Acetate, etc. Cinnamic alcohol derives: Cinnamic alcohol, 3,3-Diphenyl- |