Synthesis of sodium benzenesulfonate

Preparation of sodium benzenesulfonate

60 ml of benzene and 60 ml of concentrated sulfuric acid are mixed in a round flask, fitted to a reflex condenser. The mixture is kept at a gentle boil with frequent shaking until the top layer of benzene has been nearly absorbed by the sulfuric acid (six to eight hours). On cooling, the dark-colored liquid is poured into 1 liter of cold water contained in a large basin, boiled up and neutralized with powdered calcium hydroxide. The neutralized mass is filtered while hot and precipitated calcium sulfate, washed with hot water. The filtrate is concentrated by evaporation and the solution, which contains the calcium salt of benzene sulfonic acid, is treated with just sufficient sodium carbonate solution to precipitate the calcium as carbonate and convert the sulfonic acid into the sodium salt. The liquid is again, filtered and concentrated, by evaporation, until a sample crystallizes on cooling. The sodium benzenesulfonate is filtered and dried yielding about 80 g of final product.

A class-book of organic chemistry, by J. B. Cohen, 253, 1918





InChI Key


Canonical SMILES


MeSH Synonyms

benzenesulfonate, benzenesulfonic acid, benzenesulfonic acid hexahydrate, zinc salt,, benzenesulfonic acid, ammonium salt, benzenesulfonic acid, calcium salt, benzenesulfonic acid, iron (+3) salt, benzenesulfonic acid, magnesium salt, benzenesulfonic acid, potassium salt, benzenesulfonic acid, sodium salt, benzenesulfonic acid, zinc salt, sodium benzenesulfonate, sodium benzenesulphonate

Depositor-Supplied Synonyms

Sodium benzenesulfonate, 515-42-4, Dispersant GN, Sodium phenylsulfonate, Sodium benzenesulphonate, Sodium benzene sulfonate, Benzenesulfonic acid, sodium salt, Benzenesulfonic acid sodium salt, Sodium benzene monosulfate, UNII-K5RM14AZHX, Sodium benzene monosulfonate, SODIUM BENZOSULFONATE, CCRIS 3269, HSDB 5426, NSC 146, EINECS 208-198-2, Benzenesulfonic acid, sodium salt (1:1), AI3-19389, Benzenesulfonic acid sodium, 98-11-3 (Parent), AC1LAOFK, ACMC-209kud, K5RM14AZHX, Benzenesulfonicacidsodiumsalt, SCHEMBL28929, KSC270I2T, 147281_ALDRICH, 12680_FLUKA, 12690_FLUKA, CTK1H0429, MolPort-000-630-353, MolPort-002-362-418, MZSDGDXXBZSFTG-UHFFFAOYSA-M, ANW-31283, BENZENESULPHONICACID,SODIUMSALT, AKOS002947910, AKOS015897621, LS40553, OR14985, RP24133, RTR-018345, KB-47563, LS-32061, M910, SC-27284, B0035, FT-0622651, I09-1239, 3B3-024136, 8046-53-5

Removed Synonyms

CID10584, CID517327, 19402-64-3

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