Organic Acids
REACH
p-toluenesulfonic acid monohydrate
CAS Number
6192-52-5
EC Number
612-715-0
Abbreviation
PTSA
What is p-toluenesulfonic acid monohydrate?
p-Toluenesulfonic acid monohydrate (CAS 6192-52-5), commonly abbreviated as PTSA, is a strong organic acid in stable, water-containing crystalline form.
Where is p-toluenesulfonic acid monohydrate used?
- Coatings and adhesives: curing catalyst for amino and epoxy resin systems, accelerating crosslinking to improve hardness and chemical resistance in finished films
- Polymers: catalyst for esterification, condensation and polymerization reactions
- Pharmaceuticals: salt-forming agent for tosylate salts
- Textiles: pH control and surface modification during dyeing and finishing
- It functions as an acid catalyst and pH-regulating agent in industrial synthesis and formulation.
Commercial specifications
- Packaged in moisture-resistant containers
Other Names (Synonyms)
4-methylbenzenesulfonic acid hydrate|Benzenesulfonic acid, 4-methyl-, monohydrate|4-toluenesulfonic acid monohydrate|3BTO78GAFF|RefChem:169388|Benzenesulfonic acid, 4-methyl-, hydrate (1:1)|4-Methylbenzenesulfonic acid monohydrate|PTSA
What are the physical properties of p-toluenesulfonic acid monohydrate?
Melting Point 103-106 °C
Boiling Point 92-119 °C
Density 1,24 g/cm 3
Flash Point 180 °C
Appearance White crystals
Color White to pink
Form Solid
Water Solubility soluble
Refractive Index 1,382-1,384
pH 1 (650g/l, H2O, 20℃)(anhydrous substance)
How is p-toluenesulfonic acid monohydrate classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H314 Causes severe skin burns and eye damage
H315 Causes skin irritation
H318 Causes serious eye damage
H319 Causes serious eye irritation
H335 May cause respiratory irritation
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
Which trade and regulatory codes apply to p-toluenesulfonic acid monohydrate?
HS Code 29041000
UN Number 2585
ADR Class 8
Packing Group III
Storage Class 8A - Combustible corrosive hazardous materials