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p-Toluenesulfonic acid monohydrate

SIAL/402885 - ACS reagent, ≥98.5%

Synonym: 4-Methylbenzenesulfonic acid monohydrate; 4-Toluenesulfonic acid monohydrate; PTSA monohydrate; TsOH monohydrate

CAS Number: 6192-52-5
Empirical Formula (Hill Notation): C7H8O3S · H2O
Molecular Weight: 190.22
EC Number: 203-180-0
MDL Number: MFCD00142137
Linear Formula: CH3C6H4SO3H · H2O
Product Type: Chemical

Catalog Number PKG Qty. Price Quantity
45-402885-5G 5 g
$33.30
1/EA
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45-402885-100G 100 g
$42.20
1/EA
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45-402885-500G 500 g
$99.60
1/EA
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This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.

This image depicts SKU: 402885-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.

This image depicts SKU: 402885-500G

 

anion traces sulfate (SO42-): ≤0.3%
assay ≥98.5%
cation traces Fe: ≤0.01%
  heavy metals (as Pb): ≤0.001%
  Na: ≤0.002%
clarity of soln passes test
form solid
grade ACS reagent
ign. residue ≤0.1%
impurities 9.5-11.5% water
InChI 1S/C7H8O3S.H2O/c1-6-2-4-7(5-3-6)11(8,9)10;/h2-5H,1H3,(H,8,9,10);1H2
InChI key KJIFKLIQANRMOU-UHFFFAOYSA-N
mp 103-106 °C (lit.)
Quality Level 200 
SMILES string [H]O[H].Cc1ccc(cc1)S(O)(=O)=O
solubility H2O: 10g + 50 mL, clear, colorless
vapor density 5.9 (vs air)
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.
Packaging: 100, 500 g in poly bottle
Packaging: 5 g in glass bottle
Purity ≥98.5%
mp 103-106 °C (lit.)
UNSPSC 12352100

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