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402885 Sigma-Aldrich

p-Toluenesulfonic acid monohydrate

ACS reagent, ≥98.5%

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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: soluble10g + 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.

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Safety Information

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

Documents

Certificate of Analysis

Certificate of Origin

Protocols & Articles

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