121-04-0

Basic information

• Product Name: toluene-2,4-disulphonic acid
• Synonyms: toluene-2,4-disulphonic acid;4-Methyl-1,3-benzenedisulfonic acid
• CAS NO: 121-04-0
• Molecular Formula: C₇H₈O₆S₂
• Molecular Weight: 252.26482
• EINECS: 204-446-9
• Mol File: 121-04-0.mol
• Article Data: 2

Chemical Properties

• Melting Point: 295-297 °C
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /
• Density: 1.667g/cm³
• Refractive Index: 1.604
• PKA: -1.06±0.45(Predicted)
• CAS DataBase Reference: toluene-2,4-disulphonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: toluene-2,4-disulphonic acid(121-04-0)
• EPA Substance Registry System: toluene-2,4-disulphonic acid(121-04-0)

Safety Data

• Hazardous Substances Data: 121-04-0(Hazardous Substances Data)

Usage

General Description

Toluene-2,4-disulphonic acid is a sulfonic acid compound with the chemical formula C7H6O6S2. It is an organic compound that is used in the production of dyes, pigments, and other chemical products. Toluene-2,4-disulphonic acid is a strong acid with two sulfonic acid groups attached to a benzene ring, making it a highly water-soluble compound. It is commonly used as a source of the sulfonate functional group in organic synthesis, and it also serves as a catalyst in various chemical reactions. Additionally, it is used as an intermediate in the production of pharmaceuticals, agrochemicals, and other specialty chemicals. Toluene-2,4-disulphonic acid is handled and stored carefully due to its acidic and corrosive nature.

InChI:InChI=1/C7H8O6S2/c1-5-2-3-6(14(8,9)10)4-7(5)15(11,12)13/h2-4H,1H3,(H,8,9,10)(H,11,12,13)

Upstream product

• 104-15-4 toluene-4-sulfonic acid 
• 98-59-9 p-toluenesulfonyl chloride 
• 108-88-3 toluene 
• 133-59-5 Toluene-2-sulfonyl chloride 
• 624-31-7 4-tolyl iodide 
• 2767-77-3 toluene-2,4-disulfonyl dichloride 
• 7790-94-5 chlorosulfonic acid 
• 7664-93-9 sulfuric acid 
• 88-20-0 o-toluenesulfonic acid 
• 618-03-1 3-amino-4-methylbenzenesulfonic acid 
• 118-88-7 4-amino-toluene-2-sulfonic acid 
• 504433-96-9 toluene-2,4-disulfinic acid 
• 7732-18-5 water 
• 140-89-6 potassium ethyl xanthogenate 

Downstream Products

• 3347-99-7 4-methyl isophthalic acid 
• 496-73-1 4-methyl resorcinol 
• 88-39-1 4-formyl-1,3-benzenedisulfonic acid 
• 51084-25-4 2,4-disulfobenzoic acid 
• 103-69-5 N-ethyl-N-phenylamine 
• 854637-15-3 2,4-bis-benzenesulfonyl-toluene 
• 69-72-7 salicylic acid 
• 99-96-7 4-hydroxy-benzoic acid 

Relevant articles and documents

Kinetics of hydrolysis of aromatic mono- and disulfonyl chlorides

A continuous polarografic method of recording instantaneous concentrations of - SO2Cl groups in an aqueous acetic acid system containing CH3CO2Na has been elaborated.Ten model monosulfonyl chlorides underwent hydrolysis according to pseudo-first order kinetics (20percent H2O, 80percent v.v.CH3CO2H, 0.5 mol/dm3 CH3CO2Na).Plots of hydrolysis for seven disulfonyl dichlorides with different number of - CH3 groups have been determined.Pseudo-first order rate constants for two consecutive reactions of hydrolysis (k1 and k2) have been computed and the influence of -SO2Cl and -SO3- groups on the reactivity of the second group - SO2Cl has been discussed.The mechanism of nucleophilic substitution has also been discussed.