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p-Toluenesulfonic acid (CAS:6192-52-5)

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PTSA 磺酸


P-Toluenesulfonic acid

对甲苯磺酸 分子式.png

Identifiers

CAS Number

6192-52-5

UN Number

Not regulated as dangerous goods

Molecular formula:

C7H8SO3/CH3C6H4SO3H

Structural Formula


Molecular mass

190.22

Physical appearance

White acicular and flaky crystals.

Synonyms

p-Toluenesulfonic acid monohydrate ; 4-Methylbenzenesulfonic acid   hydrate;isinopril EP IMpurity B;-Toluenesulfonic Acid, Monohydrate, ACS;enzenesulfonic acid,4-Methyl-, hydrate (1:1);-toluene sulfonic acid(water;-Toluenesulfonic acid Monohydrate >=98.0% (T), >=98.0% (HPLC);-Toluenesulfonic acid monohydrate;-Toluenesulfonic acid monohydrate ACS reagent, >=98.5%

 

Physicochemical Properties:

 

Soluble in water, alcohols and other polar solvents.

 


Storage and handling information

Storage Stability    

The product should be stored in a   cool, dry and well-ventilated place.
  During loading and unloading, avoid damaging the packaging bags; protect from   rain and moisture absorption.

 

Packaging

Industrial grade, specific grade:   25 kg, packed in double-layer film liner bags with outer woven bags.
  Reagent grade: Packaging according to customer requirements.

 

Signal Word 

Warning

Hazard Statements  

Causes serious eye irritation

Precautionary Statements

Wash exposed areas thoroughly   after handling.


Transport Regulation

Hazardous Class

Not regulated as dangerous goods

Packing Group

Not regulated as dangerous goods


Application:

  • Organic synthesis intermediate: Widely used in        pharmaceuticals, synthetic resins, polyethers, cosmetics, food        additives, and other fields. In the pharmaceutical industry, it is an        important intermediate especially for the synthesis of doxycycline,        dipyridamole, amoxicillin, cefadroxil, and other drugs.

  • Catalyst and stabilizer: Used as a        highly efficient catalyst and stabilizer in various polymerization        reactions (e.g., esterification and condensation).

  • Curing agent: Serves as an excellent curing accelerator for epoxy        resins and amino resins, widely applied in plastics, foundry resins,        paints, and related industries.

  • Other industrial applications: Also used as a        key raw material in areas such as electroplating intermediates,        detergents, and surfactants.

 



PTSA

Item






Total acidity(c7h8o3s·h2o)≥%

93.0

95.0

97.0

98.0

99.0

Free acid(h2so4)   ≤%

3.0

2.0

0.6

0.3

0.05

Moisture≤%

4.0

3.0

2.7

1.7

1.0

Residue on ignition ≤%

/

0.2

0.2

0.2

0.02

Metting point (℃)

/

/

/

/

105-107

Ethanol dissolution test

/

Ok

Ok

Ok

Ok

Water dissolution test

/

Ok

Ok

Ok

Ok

Appearance

White

White

White

White

White


对甲苯磺酸货架.jpg1782459144156553.jpg

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