3-Hydroxybenzoic acid--99-06-9 CAS NO.99-06-9

english name: 3-hydroxybenzoic acid

english synonyms: kyselina3-hydroxybenzoova; meta-hydroxybenzoic acid; m-hba; m-hydroxy- benzoicaci; m-salicylic acid; m-salicylic acid; m-hydroxybenzoic acid 3-hydroxybenzoic acid; m-hydroxybenzoic acid m-hydroxybenzoic acid

cas number: 99-06-9

molecular formula: c7h6o3

molecular weight: 138.12

einecs no. 202-726-5

related categories: aromatic carboxylic acids, amides, anilides, anhydrides & salts; pharmacetical; benzoic acid; c7; carbonyl compounds; carboxylic acids; chemical auxiliaries; paper chemicals; chemicals for pulping; diphenyl ether herbicides; herbicide intermediates; pesticide intermediates; aromatic hydrocarbons; building blocks; carbonyl compounds; carboxylic acids; chemical synthesis; nutrition research; organic building blocks; phytochemicals by plant (food / spice / herb); vaccinium myrtillus (bilberry) ; general reagents; pharmaceutical intermediates; pyridines; raw materials; carboxylic acids

mol file: 99-06-9.mol

m-hydroxybenzoic acid

m-hydroxybenzoic acid properties

melting point 201 ° c

fema 4431 | 3-hydroxybenzoic acid

flash point 220 ° c

store below + 30 ° c.

form powder

acidity (pka) 4.06 (at 19 ° c)

color white to off-white

ph 3 (h2o) aqueous solution

slightly soluble

brn 508160

cas database 99-06-9 (cas database reference)

nist chemical information benzoic acid, 3-hydroxy- (99-06-9)

epa chemical information benzoic acid, 3-hydroxy- (99-06-9)

application and synthesis of m-hydroxybenzoic acid

chemical properties of white crystals

uses this product can be used fungicides, preservatives, plasticizers and pharmaceutical intermediates. can also be used to azo dye synthesis.

use as azo dye intermediates, but also for organic synthesis

use as fungicides, preservatives, plasticizers and pharmaceutical intermediates, can also be used to synthesize azo dyes

use between hydroxybenzoic acid herbicides fomesafen intermediates.

use as fungicides, preservatives, plasticizers and pharmaceutical intermediates. also used to synthesize dual dyes.

use as fungicides, paints, preservatives, ion exchangers, plasticizers and pharmaceutical intermediates, can also be used to synthesize azo dyes.

production methods by sulfonic acid benzoic acid, alkali melting, derived from hydrolysis.

production methods the preparation of the past is based on benzoic acid as a raw material, sulfonated with sulfuric acid, then further alkali fusion, and then acidification of the finished product. the method of sulfonation, caustic soda corrosion, high temperature, poor operating environment, now no need for the process, but with m-cresol as raw material, with acetic anhydride or acetyl chloride to protect the carboxyl as acetate, and then further air oxidation in the presence of a catalyst produces the corresponding carboxylic acid, which is hydrolyzed to yield the final product.

production method 122 kg of benzoic acid into the reaction vessel, adding 100 kg of oleum under stirring. warming to about 100 ℃, the reaction was about 2 h carboxyl sulfonic acid. then the sulfonated liquid was transferred to an alkali melting pot, 45 kg of solid sodium hydroxide was added, the temperature was raised to melt, and the sodium carboxycarbonate was obtained after 4 to 5 h of reaction. acidic hydrolysis was carried out by adding dilute sulfuric acid. cooling crystallization, filter out sodium sulfate, the filter cake with activated carbon to obtain finished products. reaction formula:

security information

dangerous goods signs xn, xi

hazard category code 22-36 / 37/38

safety instructions 26-36-37 / 39

wgk germany 3

rtecs number dh1924980

hazard note irritant

tsca yes