p-Toluenesulfonic Acid

Basic Information

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CAS Number

104-15-4

Molecular Formula

C7H8O3S

Molecular Weight

172.2 g/mol

EINECS

203-180-0

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Fine Chemicals Dyes and Pigments Organic Dyes

Basic Physical Properties

Physical State

Clear colorless to light yellow

Melting Point

106~107℃

Boiling Point

116 °C

Density

1.07

Water Solubility

soluble

Flash Point

41 °C

Solubility

DMSO (Slightly), Methanol (Slightly)

Refractive Index

1.3825-1.3845

Vapor Pressure

69.8Pa at 20℃

Odor

pungent odor

SMILES

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Cc1ccc(cc1)S(=O)(=O)O

InChI

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

InChIKey

JOXIMZWYDAKGHI-UHFFFAOYSA-N

LogP

1.24172

pKa

-0.43±0.50(Predicted)

Topological Polar Surface Area

54.370000000000005 Å²

Hydrogen Bond Donor/Acceptor

1 / 3

Complexity

206

Safety Information

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Hazard Class

Class 8 Class 8

Synonyms & References

English

TL65
TL65LS
PARATOLUENE SULPHONIC ACID
p-tolylsulfonicacid
PTSA 70
toluene-4-sulphonic
Toluene-p-sulfonate
toluenesulfonicacid,liquid,withmorethan5%freesulfuricacid
4-Methylbenzenesulfonic acid
Methylbenzenesulfonic acid
PTSA
toluene-4-sulfonic acid
Toluenesulfonic acid
Tosic acid
P-Toluene Sulfonic Acid
p-Toluenesulfonic acid monohydrate
P-Toluene Sulphonic Acid
para toluene sulfonic acid
para toluene sulphonic acid
PTS ACID
TsOH
TSA-95
Tsa-hp
Tsa-mh
TSA-65W
TSA-65M
Eltesol
对甲苯磺酸生产厂家
对甲苯磺酸
p-Toluenesulfonic acid
4-methylbenzene-1-sulfonic acid

MDL Number

MFCD00142137

EC Number

203-180-0

Customs Code

29163990

FAQ

What is p-Toluenesulfonic Acid (CAS: 104-15-4)?

P-Toluenesulfonic Acid (CAS: 104-15-4) is a strong organic acid commonly used as a catalyst in chemical reactions. Its chemical formula is C7H8O3S, and it appears as a white crystalline solid. It is soluble in water and has a pKa of around 1.1. Known for its high acidity and stability, it is widely used in industrial and laboratory settings due to its effectiveness in promoting various organic transformations.

What are the main uses of p-Toluenesulfonic Acid (CAS: 104-15-4)?

P-Toluenesulfonic Acid (CAS: 104-15-4) is primarily used as a catalyst in the synthesis of pharmaceuticals, dyes, and polymers. It is also employed in the production of surfactants and organic compounds. In food industry, it functions as a flavor enhancer and acidulant. Its versatility in promoting esterification, sulfonation, and other reactions makes it a valuable reagent in chemical research and manufacturing.

Is p-Toluenesulfonic Acid (CAS: 104-15-4) safe?

P-Toluenesulfonic Acid (CAS: 104-15-4) is generally considered safe when handled properly. However, it can cause skin and eye irritation, and inhaling its dust may lead to respiratory issues. Safety standards advise working in a well-ventilated area and using protective equipment like gloves and goggles. It is classified as a corrosive substance and should be handled with care to avoid exposure.

How should p-Toluenesulfonic Acid (CAS: 104-15-4) be stored?

P-Toluenesulfonic Acid (CAS: 104-15-4) should be stored in a cool, dry, and well-ventilated place, away from moisture and direct sunlight. It is best kept in a sealed container made of glass or plastic to prevent contamination. Storage should maintain a temperature below 25°C and humidity levels below 60%. Avoid mixing with incompatible substances to ensure stability and safety.