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p-Toluenesulfonic acid monohydrate

CAS No.: 6192-52-5
Formula: C7H10O4S
Exact Mass: 190.03000
Molecular Weight: 190.21700
PSA: 71.98000
LogP: 2.25820
Reference Price: $17/kg Post Buying Request
Description Feedback
p-Toluenesulfonic acid (PTSA or pTsOH) or tosylic acid (TsOH) is an organic compound with the formula CH3C6H4SO3H. It is a white solid that is soluble in water, alcohols, and other polar organic solvents. The CH3C6H4SO2– group is known as the tosyl group and is often abbreviated as Ts or Tos. Most often, TsOH refers to the monohydrate, TsOH.H2O.
As with other sulfonic acids, TsOH is a strong organic acid. It is about one million times stronger than benzoic acid. It is one of the few strong acids that is solid and, hence, conveniently weighed. Also, unlike some strong mineral acids (especially nitric acid, sulfuric acid, and perchloric acid), TsOH is non-oxidizing.

Properties Feedback
Appearance & Physical State:white crystals
Melting Point:103-106ºC
Boiling Point:140ºC(20.2527 torr)
Flash Point:180ºC
Refractive Index:1.382-1.384
Water Solubility:soluble
Stability:Stable. Incompatible with strong oxidizing agents, strong bases, most common metals. Protect from moisture.
Storage Condition:Store at RT.
Vapor Density:5.9 (vs air)

Safety Info Feedback

hazard declaration:H290; H314; H335
hazard declaration add:
waring notice:P260; P280; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338
Hazard Class:8
Safety Statements:S26-S37
HS Code:29041000
Packing Group:III
WGK Germany:-
RIDADR:UN 1759/2585
Risk Statements:R36/37/38
Hazard Codes:Xi


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