C7H7ClO2S
190.65 g/mol
Pharmaceutical IntermediateDanger
4-Toluenesulfonyl chloride
CAS98-59-9EC202-684-8
Category
Pharmaceutical Intermediate
Compound Class
Aromatic
Primary Use
Pharmaceutical Intermediate
4-Toluenesulfonyl chloride is a white to gray crystalline powder with a distinctive odor, insoluble in water and denser than water. It is primarily used as an intermediate in organic synthesis for manufacturing various chemicals.
Organic synthesis intermediateProduction of food additivesManufacture of foaming agents for plastics and rubber
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Cyclohexanecarboxylic acid
CAS98-89-5
pharmaceutical intermediate
ReferenceSame Category
Nitrobenzene
CAS98-95-3
pharmaceutical intermediate
ReferenceSame Category
Pyrazinoic acid
CAS98-97-5
pharmaceutical intermediate
ReferenceSame Category
4-Carboxyazetidin-2-one
CAS98019-65-9
pharmaceutical intermediate
Referencestereoisomer of
4-Toluenesulfonyl-d7 Chloride
CAS81255-49-4
research compound
Safety Reference
Danger
H290May be corrosive to metals
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H317May cause an allergic skin reaction
H318Causes serious eye damage
H335May cause respiratory irritation
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for 4-Toluenesulfonyl chloride (CAS 98-59-9) is 2904.99.
HS code (international, 6-digit)
2904.99
EU CN code (8-digit)
2904 99 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
4-methylbenzenesulfonyl chloride
InChIKey
YYROPELSRYBVMQ-UHFFFAOYSA-N
SMILES
CC1=CC=C(C=C1)S(=O)(=O)Cl
Synonyms (68)
- PTSC
- 4-TOLUOLSULFONYL CHLORIDE
- 4-Toluenesulfonyl chloride
- 4-Tosyl chloride
- 4-toluenesulphonic chloride
- 4-toluenesulphonyl chloride
- 4-toluensulfonyl chloride
- 4-toluylsulfonyl chloride
- P-TOLUENESULFONYL CHLORIDE
- Toluene-4-sulfonyl chloride
- Toluenesulfonyl chloride
- TosCl
- Tosyl chloride
- Ts-Cl
- chloro(4-methylphenyl)sulfone
- p-Toluenesulfochloride
- p-Toluenesulfonic chloride
- p-Toluenesulphonyl chloride
- p-Tolylsulfonyl chloride
- p-Tosyl chloride
- p-TsCl
- p-toluene sulphonic chloride
- p-toluenesufonyl chloride
- p-toluenesulfonoyl chloride
- p-toluenesulfonyl chlorde
- p-toluenesulfonyl chlorie
- p-toluenesulfonylchoride
- p-toluensufonylchloride
- p-toluensulfonyl chloride
- p-toluensulphonylchloride
- p-tosyl cloride
- para-Toluenesufonyl chloride
- para-Toluenesulfochloride
- para-Toluenesulfonyl chloride
- para-tolylsulfonyl chloride
- paratoluensulfonyl chloride
- rho-toluenesulfonyl chloride
- rho-toluenesulphonyl chloride
- toluene-4-sulphonyl chloride
- toluene-p-sulfonyl chloride
- toluene-p-sulphonylchloride
- tosylic chloride
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