27815
p-Toluenesulfonic acid monohydrate
≥99% (calc. to H2O free subst.)
Synonym(s):
4-Methylbenzenesulfonic acid monohydrate, 4-Toluenesulfonic acid monohydrate, PTSA monohydrate, TsOH monohydrate
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About This Item
Linear Formula:
CH3C6H5SO3H · H2O
CAS Number:
Molecular Weight:
190.22
EC Number:
203-180-0
UNSPSC Code:
12352106
NACRES:
NA.22
PubChem Substance ID:
MDL number:
Colour Index Number:
42655
Beilstein/REAXYS Number:
3568023
Assay:
≥99% (calc. to H2O free subst.)
Form:
solid
Quality Segment
assay
≥99% (calc. to H2O free subst.)
form
solid
impurities
≥85% toluene-4-solfonic acid, 8-12% water (Karl Fischer)
ign. residue
≤0.5%
SMILES string
O.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.
Application
p-Toluenesulfonic acid monohydrate is a catalyst in esterification, reductive amination, Biginelli reaction, and intermolecular coupling of the aromatic nucleus. It is also used in the preparation of various bioactive compounds via multicomponent condensation reactions.
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signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 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
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