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402885

p-Toluenesulfonic acid monohydrate

ACS reagent grade, ≥98.5%, solid

Synonym(s):

4-Methylbenzenesulfonic acid monohydrate, 4-Toluenesulfonic acid monohydrate, PTSA monohydrate, TsOH monohydrate

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About This Item

Linear Formula:
CH3C6H4SO3H · H2O
CAS Number:
6192-52-5
Molecular Weight:
190.22
NACRES:
NA.21
PubChem Substance ID:
24865132
UNSPSC Code:
12352100
EC Number:
203-180-0
MDL number:
MFCD00142137
Beilstein/REAXYS Number:
3568023
Assay:
≥98.5%
Concentration:
≥98.5%
Form:
solid
Grade:
ACS reagent
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Product Name

p-Toluenesulfonic acid monohydrate, ACS reagent, ≥98.5%

grade

ACS reagent

Quality Level

300

vapor density

5.9 (vs air)

assay

≥98.5%

form

solid

concentration

≥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%

functional group

tosylate

SMILES string

[H]O[H].Cc1ccc(cc1)S(O)(=O)=O

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

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.

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.

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pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

8A - Combustible corrosive hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Faceshields, Gloves

Regulatory Information

危险化学品

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Certificates of Analysis (COA)

Lot/Batch Number
MKCR0039
MKCQ7472
MKCQ4383
MKCQ4384
MKCQ3176

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Catalytic systems containing p-toluenesulfonic acid monohydrate catalyzed the synthesis of triazoloquinazolinone and benzimidazoquinazolinone derivatives.
Mousavi MR and Maghsoodlou MT.
Monatshefte fur Chemie / Chemical Monthly, 145(12), 1967-1973 (2014)
One-pot multicomponent synthesis of highly substituted piperidines using p-toluenesulfonic acid monohydrate as catalyst.
Sajadikhah SS, et al.
Monatshefte fur Chemie / Chemical Monthly, 143(6), 939-945 (2012)
One-pot synthesis of unsymmetrical benzils from aryl methyl ketones and arenes in the presence of selenous acid catalysed by p-toluenesulfonic acid monohydrate.
Kharkongor I, et al.
Tetrahedron Letters, 53(23), 2837-2841 (2012)
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Global Trade Item Number

SKUGTIN
402885-2.5KG04065273544107
402885-5G04061831986129
402885-100G04061835555093
402885-500G04061835562954