Gallic acid, also known as gallic acid or gallic acid, is an organic acid found in gallnut, hamamelis, lacquer tree, oak bark, tea. Chemical formula C6H2 (OH) 3COOH. Gallic acid is soluble in water, alcohols and ethers; has the properties of phenol (easily oxidized by ferric chloride aqueous solution to form blue-black precipitation) and carboxylic acid (loss of carbon dioxide to pyrogallic acid when heated). Gallic acid can be used as a developer. Its alkaline bismuth salt is used as a preservative and is often used in the pharmaceutical industry. It is the raw material for making hallucinogens.
Appearance and properties: white crystalline powder
Melting point: 252 °C (Dec.) (lit.)
Boiling point: 501.1 °C at 760 mmHg
Flash point: 271°C refractive index: 1.73
Water solubility: 12 g/L cold water
Stability: Stability Stable, but may discolour on exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides.
Storage conditions: storehouse low temperature, ventilation, drying
Steam pressure: 7.32E-11mmHg at 25 °C
Customs Code: 2918290000
Danger category code: R36/37/38
Safety instructions: S26-S36-S24/25
Dangerous goods sign: Xi
It has antibacterial effect and can treat bacillary dysentery. It has the functions of convergence, hemostasis and antidiarrhoea. It can be used as a preservative. It can prepare pyrogallol, medicine, ink, dyestuff and explosion-proof agent. It is also used as a developer and analytical reagent for the detection of free inorganic acids, dihydroxyacetone, alkaloids and metals.