Fumaric acid, also known as fumaric acid, fumaric acid), purple pansy acid or usnic acid, namely the fumaric acid (IUPAC name (E) - butylene acid), is a colorless, flammable, crystal, by the carboxylic acid derived from butene.It is the chemical formula of C4H4O4.Fumaric acid combustion will release irritating maleic anhydride smoked.The taste like fruit and rhizoma corydalis, porcini, lichens and seaweed can be found in Iceland.
Product Name：Trans-2-Butenedioic acid
Physical state: Solid
Form: Granules or crystalline powder
Odor threshold: Not available
pH: 2.24 for a 0.5% w/v solution at 25°c.
Vapor pressure: 0.000154 mm Hg (25 °C)
Vapor density：Not available
Boiling point： 200 °C
Melting point/Freezing point： 287 °C
Solubility (water)： Soluble(7 g/L, 25 °C)
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