P-Toluenesulfonic Acid Monohydrate
Experimental characteristics
LogP2.25820
PSA71.98000
Merck9533
Refractive index 1,382-1,384
Water-soluble dissolved
boiling point 428.9 °C at 760 mmHg
Melting point 104.0 to 107.0 deg-C
Flash point 180 ºC
Solubility H2O: 0.1 g/mL, clear
Color and properties colorless monoclinic sheet or columnar crystals
PH 1 (650g/l, H2O, 20°C)(anhydrous substance)
Stability Stable. Incompatible with strong oxidizing agents, strong bases, most common metals. Protect from moisture.
solubility soluble in water, 0.1g/mL, soluble in ethanol and ether, slightly soluble in water and hot benzene.
Sensitivity Hygroscopic
Density 1.24
Molecular structure data
Molar refractive index: 41.72
Molar volume (cm3/mol): 128.4
Isotonic specific volume (90.2K): 338.5
Surface tension (dyne/cm): 48.2
Polarizability (10-24cm3): 16.54
Computational chemical data
Hydrophobic parameters calculation reference value (XlogP): 1.7
Number of hydrogen bonded donors: 1
Number of hydrogen bond receptors: 3
Number of rotatable chemical bonds: 1
Number of tautomers:
Topological molecular polar surface area (TPSA): 54.4
Number of heavy atoms: 11
Surface charge: 0
Complexity: 206
Number of isotope atoms: 0
Determine the number of atomic stereoscopic centers: 0
Number of uncertain atomic stereoscopic centers: 0
Determine the number of chemical bond stereotactic centers: 0
Number of uncertain chemical bond stereotactic centers: 0
Number of covalent bond units: 1
It is widely used in the synthesis of pharmaceuticals, pesticides, stabilizers for polymerization reactions and catalysts for organic synthesis (esters, etc.). Used as an intermediate and resin curing agent for pharmaceuticals and coatings, and also used as an electroplating intermediate.
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