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p-Toluenesulfonic acid monohydrate

p-Toluenesulfonic acid monohydrate Structure
CAS No.
6192-52-5
Chemical Name:
p-Toluenesulfonic acid monohydrate
Synonyms
PTSA;TOLUENE-4-SULFONIC ACID;PTX;PTSA.H2O;4-Methylbenzenesulfonic acid hydrate;TOLUENESULFONIC ACID MONOHYDRATE;PARA TOLUENE SULFONIC ACID;p-Toluenesulfonic acid hydrate;4-TOLUENESULFONIC ACID MONOHYDRATE;PTSA Monohydrate
CBNumber:
CB3173385
Molecular Formula:
C7H10O4S
Molecular Weight:
190.22
MOL File:
6192-52-5.mol
MSDS File:
SDS
Modify Date:
2024/6/17 17:42:23

p-Toluenesulfonic acid monohydrate Properties

Melting point 96-99 °C(lit.)
Boiling point 140°C 20mm
Density 1,24 g/cm3
vapor density 5.9 (vs air)
refractive index 1,382-1,384
Flash point 180 °C
storage temp. Store at +5°C to +30°C.
solubility H2O: 0.1 g/mL, clear
Colour Index 42655
form Solid
color White to pink
PH 1 (650g/l, H2O, 20℃)(anhydrous substance)
Water Solubility soluble
Sensitive Hygroscopic
Merck 14,9533
BRN 3568023
Stability Stable. Incompatible with strong oxidizing agents, strong bases, most common metals. Protect from moisture.
InChIKey KJIFKLIQANRMOU-UHFFFAOYSA-N
CAS DataBase Reference 6192-52-5(CAS DataBase Reference)
EPA Substance Registry System Benzenesulfonic acid, 4-methyl-, monohydrate (6192-52-5)

SAFETY

Risk and Safety Statements

Symbol(GHS) 
GHS05,GHS07
Signal word  Danger
Hazard statements  H290-H314-H335-H412
Precautionary statements  P234-P260-P273-P280-P303+P361+P353-P305+P351+P338
Hazard Codes  Xi,C
Risk Statements  36/37/38-34-37
Safety Statements  26-37-45-36/37/39
RIDADR  UN 2585 8/PG 3
WGK Germany  -
RTECS  XT6300000
3
Autoignition Temperature 600 °C
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  29041000
Toxicity LD50 orally in Rabbit: 2570 mg/kg
NFPA 704
1
3 0

p-Toluenesulfonic acid monohydrate price More Price(35)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich(India) T35920 p-Toluenesulfonic acid monohydrate ReagentPlus?, ≥98% 6192-52-5 5G ₹2215.5 2022-06-14 Buy
Sigma-Aldrich(India) T35920 p-Toluenesulfonic acid monohydrate ReagentPlus?, ≥98% 6192-52-5 100G ₹3766.35 2022-06-14 Buy
Sigma-Aldrich(India) T35920 p-Toluenesulfonic acid monohydrate ReagentPlus?, ≥98% 6192-52-5 3KG ₹7089.6 2022-06-14 Buy
Sigma-Aldrich(India) T35920 p-Toluenesulfonic acid monohydrate ReagentPlus?, ≥98% 6192-52-5 500G ₹7490.5 2022-06-14 Buy
Sigma-Aldrich(India) T35920 p-Toluenesulfonic acid monohydrate ReagentPlus?, ≥98% 6192-52-5 15KG ₹46388.35 2022-06-14 Buy
Product number Packaging Price Buy
T35920 5G ₹2215.5 Buy
T35920 100G ₹3766.35 Buy
T35920 3KG ₹7089.6 Buy
T35920 500G ₹7490.5 Buy
T35920 15KG ₹46388.35 Buy

p-Toluenesulfonic acid monohydrate Chemical Properties,Uses,Production

Chemical Properties

White crystals

Uses

p-Toluenesulfonic acid monohydrate is used as a catalyst in the synthesis of resveratrol, in oxane derivatives as an antimalarial agent, as substituted piperidine and unsymmetrical benzyl. It acts as a catalyst in the preparation of 1,3,5-trisubstituted pyrazoles derivatives, selenated ketene dithioacetals, triazoloquinazolinone and benzimidazoquinazolinone derivatives. It also serves as an intermediate in the esterification and in reductive amination reactions.

General Description

p-Toluenesulfonic acid monohydrate, an oxonium salt, is an inexpensive and easy to handle organic catalyst used in organic synthesis. The study of its crystalline structure shows that it is monoclinic with P21/c space group. Its solubility in aqueous sulfuric acid solutions has been studied.

Purification Methods

Purify the acid by precipitation from a saturated solution at 0o by introducing HCl gas. It can also be crystallised from conc HCl, then crystallised from dilute HCl (charcoal) to remove benzenesulfonic acid. It has been crystallised from EtOH/water. Dry it in a vacuum desiccator over solid KOH and CaCl2. p-Toluenesulfonic acid can be dehydrated by azeotropic distillation with *benzene or by heating at 100o for 4hours under water-pump vacuum. The anhydrous acid can be crystallised from *benzene, CHCl3, ethyl acetate, anhydrous MeOH, or from acetone by adding a large excess of *benzene. It can also be dried under vacuum at 50o. The S-benzylisothiuronium salt has m 182o (from aqueous EtOH). [Beilstein 11 IV 241.]

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p-Toluenesulfonic acid monohydrate Spectrum

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