English Synonyms
TL65;TL65LS;PARATOLUENE SULPHONIC ACID;p-tolylsulfonicacid;PTSA 70;toluene-4-sulphonic;Toluene-p-sulfonate;toluenesulfonicacid,liquid,withmorethan5%freesulfuricacid
p-Toluenesulfonic Acid Properties
| Melting Point | 106~107℃ |
| Boiling Point | 116 °C |
| Density | 1.07 |
| Vapor Pressure | 69.8Pa at 20℃ |
| Refractive Index | 1.3825-1.3845 |
| Flash Point | 41 °C |
| Storage Condition | Inert Atmosphere,Room Temperature |
| Solubility | Soluble in Dmso (A Little), Methanol (A Little) |
| Acidity Coefficient (pKa) | -0.43±0.50(Predicted) |
| Form | The Solution May Darken in Color During Storage. |
| Color | Transparent Colorless to Light Yellow |
| Odor | Pungent Smell |
Uses and Synthesis of p-Toluenesulfonic Acid
Overview
p-Toluenesulfonic Acid (Molecular Formula: P-Ch3c6h4so3h, Also Written as Tsoh, English P-Toluene Sulfonic Acid) Referred to as Pts, Is a Non-oxidizing Organic Strong Acid, White Needle-Shaped or Powdery Crystals, Soluble in Water, Alcohol, Ether and Other Polar Solvents. It Is Very Easy to Deliquesce, Easily Dehydrate Wood and Cotton Fabrics and Carbonize, And Is Difficult to Dissolve in Benzene and Toluene; It Generates P-Cresol When Alkali Fused.
Use
p-Toluenesulfonic Acid Is Widely Used in the Synthesis of Medicines, Pesticides, Stabilizers for Polymerization Reactions, Catalysts for Organic Synthesis (Esters, Etc.), Intermediates for Coatings, And Resin Curing Agents. It Is a Commonly Used Acid Catalyst in Organic Synthesis. It Can Be Neutralized with Sodium Hydroxide to Produce Sodium P-Toluenesulfonate, And Then Reacted with Phosphorus Pentachloride to Produce P-Toluenesulfonyl Chloride. The Latter Is Used in Nucleophilic Substitution Reactions and Is Also Used as a Protecting Group for Alcohol Hydroxyl Groups. P-Toluenesulfonic Acid Is Also Used to Catalyze the Dihydrofuran Protecting Group on Alcohols, Carboxylic Acid Esterification, Transesterification Reactions, And the Formation of Acetals from Aldehydes.
Preparation
In Industry, P-Toluenesulfonic Acid Is Produced by Sulfonating Toluene with Concentrated Sulfuric Acid. The Produced P-Toluenesulfonic Acid Often Contains Benzenesulfonic Acid and Sulfuric Acid as Impurities, Which Can Be Purified by Recrystallizing the Impure Sample in Concentrated Hydrochloric Acid and Then Drying It Azeotropically.
Production Method
P-Toluenesulfonic Acid Is Obtained by Hydrolysis of P-Toluenesulfonyl Chloride. It Can Also Be Obtained by Sulfonation of Toluene with Sulfuric Acid.
Category
Corrosive Items
Storage and Transportation Characteristics
The Warehouse Is Ventilated, Low Temperature and Dry; Stored Separately from Alkali
Safety Information
| Dangerous Goods Signs | C |
| Hazard Category Code | 34-10 |
| Dangerous Goods Transport Number | 2585 |
| Hazard Level | 8 |
| Packaging Category | III |
| Customs Code | 29163990 |
