p-Toluenesulfonic acid monohydrate

Basic Information

View in Editor

CAS Number

6192-52-5

Molecular Formula

C7H10O4S

Molecular Weight

190.22 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Fine Chemicals Dyes and Pigments Organic Dyes

Basic Physical Properties

Melting Point

104.0 to 107.0 deg-C

Boiling Point

428.9°C at 760 mmHg

Density

1.24

Flash Point

180 ºC

Solubility

H2O: 0.1 g/mL, clear

Refractive Index

1,382-1,384

SMILES

View in Editor

CC1=CC=C(C=C1)S(=O)(=O)O.O

InChI

InChI=1S/C7H8O3S.H2O/c1-6-2-4-7(5-3-6)11(8,9)10;/h2-5H,1H3,(H,8,9,10);1H2

InChIKey

KJIFKLIQANRMOU-UHFFFAOYSA-N

LogP

0.4170200000000001

Topological Polar Surface Area

85.87 Å²

Hydrogen Bond Donor/Acceptor

3 / 4

Complexity

206

Safety Information

View Safety Information

GHS Hazard Pictograms

H315

H319

H335

Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

H335 May cause respiratory irritation
Specific target organ toxicity, single exposure; Respiratory tract irritation

Hazard Class

Class 8 Class 8

Stability

Stable. Incompatible with strong oxidizing agents, strong bases, most common metals. Protect from moisture.

Sensitiveness

Hygroscopic

Synonyms & References

English

4-Methylbenzenesulfonic acid hydrate
Lisinopril EP IMpurity B
p-Toluenesulfonic Acid, Monohydrate, ACS
Benzenesulfonic acid,4-Methyl-, hydrate (1:1)
p-Toluenesulfonic acid monohydrate
4-Methylbenzenesulfonic acid monohydrate
p-Toluenesulfonicacid
PTSA Monohydrate
Toluene-4-sulfonic acid
PTSA
Toluene-4-sulfonic acid monohydrate
p-Toluene sulfonic acid monohydrate
Benzenesulfonic acid, 4-methyl-, monohydrate
ptoluenesulfonic acid
4-methylbenzene-1-sulfonic acid hydrate
p-Toluenesulphonic acid monohydrate
3BTO78GAFF
para-toluenesulfonic acid hydrate
4-toluenesulfonic acid monohydrate
para-toluenesulfonic acid monohydrate
4-methylbenzenesulphonic acid hydrate
para-toluene
4-methylbenzenesulfonic acid
water (1:1)
4-methylbenzenesulphonic acid monohydrate
p-toluene sulphonic acid hydrate
p-toluenesulfonic acid mono-hydrate
p- toluenesulfonic acid monohydrate
4-toluene-sulphonic acid hydrate
4-toluenesulphonic acid mono hydrate
p-Toluenesulfonic acid monohydrate, ACS reagent, >=98.5%

MDL Number

MFCD00142137

Customs Code

29041000

FAQ

What is p-Toluenesulfonic acid monohydrate (CAS: 6192-52-5)?

P-Toluenesulfonic acid monohydrate is a white crystalline solid commonly used as a catalyst in organic synthesis. Its chemical formula is C7H8O3S. It is a strong acid with a pKa of around 0.5, and it is soluble in water and many organic solvents. The monohydrate form contains one molecule of water per molecule of acid, which affects its physical properties and solubility.

What are the main uses of p-Toluenesulfonic acid monohydrate (CAS: 6192-52-5)?

P-Toluenesulfonic acid monohydrate is widely used in the pharmaceutical industry as a catalyst for esterification and acylation reactions. It also finds applications in polymer synthesis, as a reagent in the production of surfactants, and in the manufacturing of dyes and pesticides. In research settings, it serves as a versatile acid catalyst for various organic transformations.

Is p-Toluenesulfonic acid monohydrate (CAS: 6192-52-5) safe?

P-Toluenesulfonic acid monohydrate is generally considered safe when handled properly. However, it is corrosive and can cause skin and eye irritation. It is important to use appropriate personal protective equipment (PPE), such as gloves and goggles, and to work in a well-ventilated area. Safety standards recommend caution during storage and handling to prevent exposure and ensure safe laboratory practices.

How should p-Toluenesulfonic acid monohydrate (CAS: 6192-52-5) be stored?

P-Toluenesulfonic acid monohydrate should be stored in a cool, dry, and dark place, ideally at temperatures below 25°C. It is sensitive to moisture and should be kept in a sealed container to maintain its stability. To prevent degradation, it should be protected from light and stored away from incompatible materials. Proper storage ensures its effectiveness and safety in both industrial and research applications.