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402885 Sigma-Aldrich

p-Toluenesulfonic acid monohydrate

ACS reagent, ≥98.5%

  • CAS Number 6192-52-5

  • Linear Formula CH3C6H4SO3H · H2O

  • Molecular Weight 190.22

  •  Beilstein Registry Number 3568023

  •  EC Number 203-180-0

  •  MDL number MFCD00142137

  •  PubChem Substance ID 24865132

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Properties

Related Categories Acids, Acids & Bases, Chemical Synthesis, Organic Acids, Synthetic Reagents More...
grade   ACS reagent
vapor density   5.9 (vs air)
InChI Key   KJIFKLIQANRMOU-UHFFFAOYSA-N
assay   ≥98.5%
clarity of soln   passes test
impurities   9.5-11.5% water
ign. residue   ≤0.1%
mp   103-106 °C(lit.)
solubility   H2O: 10g + 50 mL, clear, colorless
anion traces   sulfate (SO42-): ≤0.3%
cation traces   Fe: ≤0.01%
  Na: ≤0.002%
  heavy metals (as Pb): ≤0.001%

Description

Packaging

100, 500 g in poly bottle

5 g in glass bottle

Application

p-Toluenesulfonic acid monohydrate (p-TsOH·H2O) may be used as a catalyst in the synthesis of the following:
• Unsymmetrical benzils.
• Highly substituted piperidines.
• 1,3,5-Trisubstituted benzenes by trimerization of alkynes.
• Triazoloquinazolinone and benzimidazoquinazolinone derivatives.
• 1,3,5-Trisubstituted pyrazoles derivatives.
• Selenated ketene dithioacetals.

General description

p-Toluenesulfonic acid monohydrate, an oxonium salt, is an inexpensive and easy to handle organic catalyst used in organic synthesis. The study of its crystalline structure shows that it is monoclinic with P21/c space group. Its solubility in aqueous sulfuric acid solutions has been studied.

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Personal Protective Equipment 
RIDADR 
UN 2585PSN2 8 / PGIII
WGK Germany 
1

Documents

Certificate of Analysis

Certificate of Origin


LC-MS Grade Solvents and Reagents

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Peer-Reviewed Papers
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