TIANFUCHEM--99-50-3--High purity 3,4-Dihydroxybenzoic acid factory price CAS NO.99-50-3

3,4-dihydroxybenzoic acid

english synonyms: carbohydroquinonic acid; hypogallic acid; protocatechuic aci; protocatechuic acid, 4-carboxybenzene-1,2-diol, 4- carboxycatechol; 3,4-dihydroxybenzoic acid / protocatechuicacid; ); 3,4-dihydroxybenzoic acid vetec (tm) reagent grade, 97%; 3,4-dihydroxybenzoic acid,> = 99%

cas number: 99-50-3

molecular formula: c7h6o4

molecular weight: 154.12

einecs no. 202-760-0

chinese herbal medicine reference standard from chinese medicinal herbs (tcm); standardized herbal extract; reference standard from chinese medicinal herbs; reference standard from chinese medicinal herbs; aromatics, metabolites & impurities, pharmaceuticals, intermediates & fine chemicals; general reagents; small molecules inhibitors; inhibitors; small molecules inhibitors; natural products; flavors & fragrances; chemical reagents; food additives; agriculture and environmental standards; aromatic carboxylic acids, amides, anilides, anhydrides & salts; benzoic acid derivative; organic acids; pharmaceutical intermediates; pharmaceutical raw materials; api; sy; aromatic allium cepa (onion); building blocks; c7; carbonyl compounds; carboxylic acids; chemical curcuma longa (turmeric); ginkgo biloba; nutrition research; organic building blocks; phytochemicals by plant (food / spice / herb); vaccinium myrtillus (bilberry)

mol file: 99-50-3.mol

3,4-dihydroxybenzoic acid

3,4-dihydroxybenzoic acid properties

melting point 197-200 ° c (dec.) (lit.)

density 1.54

fema 4430 | 3,4-dihydroxybenzoic acid

store below + 30 ° c.

solubility 20g / l

form fine crystalline powder

acidity coefficient (pka) 4.48 (at 25 ° c)

color beige to brown

soluble in hot alcohol and ether. slightly soluble in water.

sensitivity

merck 14,7894

brn 1448841

stable. incompatible with strong oxidizing agents, strong bases.

cas database 99-50-3 (cas database reference)

epa chemical information benzoic acid, 3,4-dihydroxy- (99-50-3)

3,4-dihydroxybenzoic acid use and synthesis method

chemical nature of white to slightly brown needle crystal. melting point of about 200 ℃ (decomposition). soluble in hot water, ethanol and ether, slightly soluble in cold water, insoluble in benzene. decomposes in boiling water and emits carbon dioxide. case of ferric chloride aqueous solution was green, sodium bicarbonate case was dark red.

use as a dye, pharmaceutical intermediates

use as a dye, pharmaceutical intermediates, analytical reagents (test iron).

production methods vanillin by alkali melting, acidification derived.