4-Toluene sulfochloride
4-Methylbenzenesulfonyl chloride
p-Toluenesulfonyl chloride
Toluene-4-sulfonyl chloride
4-Toluolsulfonyl chloride
p-Tosyl Chloride
CAS 98-59-9
Purity 99.5%min
Packing 25kg/50kg bag or drum
p-Toluene Sulfonyl Chloride (PTSC)
| Name | Tosyl chloride |
| Synonyms | 4-Toluene sulfochloride; 4-Methylbenzenesulfonyl chloride; p-Toluenesulfonyl chloride; Toluene-4-sulfonyl chloride; 4-Toluolsulfonyl chloride; p-Tosyl Chloride |
| Molecular Structure | ![]() |
| Molecular Formula | C7H7ClO2S |
| Molecular Weight | 190.64 |
| CAS Registry Number | 98-59-9 |
| EC Number | 202-684-8 |
Specification:

Uses:
▲Organic synthesis protecting reagent: Most widely used as a protecting group for hydroxyl and amino groups.
▲Pharmaceutical intermediate: Used in the synthesis of APIs such as sulfonamides and thiamphenicol.
▲Agrochemical intermediate: Used in the production of herbicides like sulcotrione and sulfentrazone.
▲Dye intermediate: Used in the production of disperse dyes and acid dyes.
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