| Formula / Notation | C7H8O3S |
|---|---|
| CAS Number | 104-15-4 |
| Molecular Weight | 172.20 |
| Melting Point | 221 °F (USCG, 1999) |
| Boiling Point | 140 °C @ 20 MM HG |
| Density | 1.45 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | ABOUT 67 G/100 ML WATER; SOL IN ALCOHOL, ETHER |
| Appearance | Toluene sulfonic acid, liquid, with more than 5% free sulfuric acid appears as colorless to black solid. Odorless or nearly odorless. (USCG, 1999) |
| Also Known As | 4-methylbenzenesulfonic acid; 4-Methylbenzenesulfonic acid; 104-15-4; 4-Toluenesulfonic acid; p-Toluenesulphonic acid; Tosic acid; Toluene-4-sulfonic acid; p-Tolylsulfonic acid; Tosylic acid; Toluenesulfonic acid |
| Category | Laboratory Reagents |
What is p-Toluenesulfonic acid?
Toluene-4-sulfonic acid is an arenesulfonic acid that is benzenesulfonic acid in which the hydrogen at position 4 is replaced by a methyl group. It is a member of toluenes and an arenesulfonic acid. It is a conjugate acid of a toluene-4-sulfonate.
Formula & Notation
IUPAC Name: 4-methylbenzenesulfonic acid
Other Names / Synonyms: 4-methylbenzenesulfonic acid; 4-Methylbenzenesulfonic acid; 104-15-4; 4-Toluenesulfonic acid; p-Toluenesulphonic acid; Tosic acid; Toluene-4-sulfonic acid; p-Tolylsulfonic acid; Tosylic acid; Toluenesulfonic acid
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 221 °F (USCG, 1999) |
| Boiling Point | 140 °C @ 20 MM HG |
| Density | 1.45 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Molecular Weight | 172.20 |
| Solubility | ABOUT 67 G/100 ML WATER; SOL IN ALCOHOL, ETHER |
| Appearance | Toluene sulfonic acid, liquid, with more than 5% free sulfuric acid appears as colorless to black solid. Odorless or nearly odorless. (USCG, 1999) |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Toluene-4-sulfonic acid is an arenesulfonic acid that is benzenesulfonic acid in which the hydrogen at position 4 is replaced by a methyl group. It is a member of toluenes and an arenesulfonic acid. It is a conjugate acid of a toluene-4-sulfonate.
Used as a synthetic reagent for transformations including oxidation, reduction, coupling, or functional group manipulation.
Hazardous reagent. May be toxic, corrosive, flammable, or reactive. Use in fume hood with full PPE. Consult SDS before use.
The formula or notation for p-Toluenesulfonic acid is: C7H8O3S