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Merck
CN

T35920

p-Toluenesulfonic acid monohydrate

≥98%, solid, ReagentPlus®

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
UNSPSC Code:
12352100
PubChem Substance ID:
57654665
NACRES:
NA.21
EC Number:
203-180-0
MDL number:
MFCD00142137
Beilstein/REAXYS Number:
3568023

Key Documents

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Product Name

p-Toluenesulfonic acid monohydrate, ReagentPlus®, ≥98%

InChI key

[KJIFKLIQANRMOU-UHFFFAOYSA-N]
KJIFKLIQANRMOU-UHFFFAOYSA-N

InChI

[1S/C7H8O3S.H2O/c1-6-2-4-7(5-3-6)11(8,9)10;/h2-5H,1H3,(H,8,9,10);1H2]
1S/C7H8O3S.H2O/c1-6-2-4-7(5-3-6)11(8,9)10;/h2-5H,1H3,(H,8,9,10);1H2

SMILES string

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

vapor density

5.9 (vs air)
5.9 (vs air)

product line

ReagentPlus®

assay

≥98%

form

solid

mp

103-106 °C ((lit.))
103-106 °C (lit.)

functional group

tosylate

Quality Level

200

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Application

p-toluenesulfonic acid monohydrate may be used as a better alternative to Friedel-Crafts catalysts for the alkylation of the aromatic nucleus with activated alkyl halides, alkenes, or tosylates under mild conditions.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

CorrosionExclamation mark
GHS05,GHS07

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1C - 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, type P3 (EN 143) respirator cartridges

Regulatory Information

危险化学品
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Certificates of Analysis (COA)

Lot/Batch Number
BCCN8814
BCCN8534
BCCN8535
BCCN8533
BCCN7319

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Detailed characterization of p-toluenesulfonic acid monohydrate as a convenient, recoverable, safe, and selective catalyst for alkylation of the aromatic nucleus.
Mahindaratne MPD and Wimalasena K.
The Journal of Organic Chemistry, 63(9), 2858-2866 (1998)
Daniel C Yee et al.
The FEBS journal, 280(22), 5780-5800 (2013-08-29)
Visual rhodopsins are recognized members of the large and diverse family of G protein-coupled receptors (GPCRs), but their evolutionary origin and relationships to other proteins are not known. In a previous paper [Shlykov MA, Zheng WH, Chen JS & Saier
Zhiqiang Ji et al.
Inorganic chemistry, 49(4), 1337-1346 (2010-01-23)
Two back-to-back terpyridine ligands using fluorenyl as bridging group (1-L and 2-L) and their corresponding dinuclear platinum(II) complexes (1 and 2) were synthesized and characterized. Their electronic absorption, photoluminescence, and the triplet transient difference absorption were systematically investigated. Both ligands
Jhonny Azuaje et al.
ACS combinatorial science, 13(1), 89-95 (2011-01-21)
We document here the use of polymer-supported p-toluenesulfonic acid as a highly effective, robust, economical and eco-friendly isocyanide scavenger. The herein described strategy circumvent the intense and repulsive odor of volatile isocyanides, enabling simplified and odorless workup and purifications. The
Aditya Kulkarni et al.
Organic letters, 13(19), 5124-5127 (2011-09-10)
An environmentally benign procedure for the hydrogenation of unprotected indoles is described. The hydrogenation reaction is catalyzed by Pt/C and activated by p-toluenesulfonic acid in water as a solvent. The efficacy of the method is illustrated by the hydrogenation of
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