Name: p-toluenesulfonic acid
English name: PTS, PTSA
Chemical formula: C7H8O3S
Molecular weight: (anhydrous) 172.20 g mol-1 (monohydrate) 190.22 g·mol⁻¹
CAS Registry Number: 104-15-4
EINECS accession number: 203-180-0
Melting point: 38 °C (no water) 103.5 °C (one water)
Boiling point: 140 ℃, 20 mmHg
Water solubility: 67 g/100 ml
Density: 1.24 g/cm3
External view: white crystal
Flash point: 41℃
Application: stabilizer, catalyst, curing agent and intermediate
Safety description: flammable, emit toxic gas sulfur oxide in fire
Hazard symbol: C
Dangerous goods transportation number: 2585
use
Widely used in the synthesis of medicines, pesticides, polymerization stabilizers and organic synthesis (esters, etc.) catalysts. Used as an intermediate for medicine and coatings and as a resin curing agent, as well as an intermediate for electroplating.
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