WikiNow lets you discover the news you care about, follow the topics that matter to you and share your favourite stories with your friends.

© WikiNow

Protocatechuic acid is a dihydroxybenzoic acid, a type of phenolic acid. It is a major metabolite of antioxidant polyphenols found in green tea. It has mixed effects on normal and cancer cells in in vitro and in vivo studies.

Protocatechuic acid
Protocatechusäure.svg
Names
IUPAC name
3,4-Dihydroxybenzoic acid
Other names
3,4-Dihydroxybenzoic acid
PCA
Protocatechuate
Identifiers
99-50-3
3D model (Jmol) Interactive image
ChEBI CHEBI:36062
ChEMBL ChEMBL37537
ChemSpider 71
DrugBank DB03946
ECHA InfoCard 100.002.509
EC Number 202-760-0
PubChem 72
RTECS number UL0560000
Properties
C7H6O4
Molar mass 154.12 g/mol
Appearance light brown solid
Density 1.54 g/cm
Melting point 221 °C (430 °F; 494 K) (decomposes)
1.24 g/100 mL
Solubility soluble in ethanol, ether
insoluble in benzene
Acidity (pKa) 4.48
Hazards
Safety data sheet MSDS
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY verify (what is  ?)
Infobox references
UV visible spectrum of protocatechuic acid

Protocatechuic acid (PCA) is a dihydroxybenzoic acid, a type of phenolic acid. It is a major metabolite of antioxidant polyphenols found in green tea. It has mixed effects on normal and cancer cells in in vitro and in vivo studies.