Intermediates/Pharmaceutical intermediates

Alias: 3,4,5-Trihydroxybenzoic acid; Pyrogallol-5-carboxylic acid; Gallic Acid Anhydrous; Gallic acid(anhydrous)

Chemical name: 3,4,5-Trihydroxybenzoic acid

Molecular formula and molecular weight: C₇H₈O₆   188.13

Properties: this product is white or white crystalline powder, soluble in 85 parts of water, 6 parts of ethyl alcohol, 2 parts of boiled water, slightly soluble in diethyl ether.

Specification: meets European standard -93(class A), Japanese 115 standard (class A), United States Pharmacopeia 21 edition (1985), superior product.

Quality index

Content: ≥99.0%

Sulfate: ≤10PPM

Solubility test: clear and transparent

Tannin test: ≤1.0PPM

Drying loss: ≤10.0%

Ignition residue: ≤0.1%

Storage: keep in airtight container.

Packing: plastic woven bag, net weight 25kg/bag

Uses:

(1)As hemostatic for urinary system.

(2)In preparing perpetual blue ink

(3)as operation auxiliary for planographic printing and cast printing.

(4)As developing agent.

(5) As colloid stabilizer in wallboard production.

(6) As mordant in producing colored paper and colored fiber board.

(7) As analysis for alkaloid, metal and inorganic acid.

(8)This product is an important organic raw material.