| Identification | |
| Name: | Gallic acid |
| Synonyms: | 3,4,5-Trihydroxybenzoic acid; Pyrogallol-5-carboxylic acid; Gallic Acid Anhydrous |
| CAS: | 149-91-7 |
| EINECS: | 205-749-9 |
| Molecular Formula: | C7H6O5 |
| Molecular Weight: | 170.12 |
| InChI: | InChI=1/C7H6O5/c8-4-1-3(7(11)12)2-5(9)6(4)10/h1-2,8-10H,(H,11,12) |
| Molecular Structure: |  |
| Properties | |
| Transport: | 25kgs |
| Density: | 1.694 |
| Stability: | Stability Stable, but may discolour upon exposure to light. Hygroscopic. Incompatible with strong oxidizing agents, strong bases, acid chlorides, acid anhydrides. |
| Refractive index: | 1.73 |
| Water Solubility: | 12 g/L cold water |
| Solubility: | 12 g/L cold water |
| Appearance: | white crystalline powder |
| Specification: |
? Gallic acid , with CAS number of 149-91-7, can be called 3,4,5-Trihydroxybenzoes?ure ; 3,4,5-trihydroxy-Benzoic acid ; Acid, Gallic ; Acide 3,4,5-trihydroxybenzo?que ; benzoic acid, 3,4,5-trihydroxy- . It is a?white powder,?Gallic acid do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids. These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (for example, by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid. |
| Report: |
Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program. |
| Storage Temperature: | Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light. |
| Color: | Colorless or slightly yellow cyrstalline needles or prisms. NEEDLES FROM ABSOLUTE METHANOL OR CHLOROFORM White needles |
| Usage: | Manufac gallic acid esters, pyrogallol, inks, as photographic developer, in tanning, in dyeing, in testing for free mineral acids, dihydroxyacetone and alkaloids. Esters as antioxidants. Formerly as astringent, styptic. |
| Safety Data | |
| Hazard Symbols |
Xi:Irritant
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