Basic information
- Name:
Benzenesulfonylchloride, 4-methyl-
- Superlist Name:
- Tosyl chloride
- CAS No.:
98-59-9
- Molecular Structure:

- Formula:
- C7H7ClO2S
- Molecular Weight:
- 190.65
- Synonyms:
- 4-Methylbenzene-1-sulfonyl chloride;4-Methylbenzenesulfonylchloride;4-Methylphenylsulfonyl chloride;4-Toluenesulfonyl chloride;4-Toluensulfonyl chloride;4-Toluolsulfonyl chloride;4-Tosyl chloride;NSC175822;Toluenesulfonyl chloride;p-Methylbenzenesulfonylchloride;p-Methylphenylsulfonyl chloride;p-Toluenesulfochloride;p-Toluenesulfonic acid chloride;p-Toluenesulfonic chloride;p-Toluenesulphonylchloride;p-Tolylsulfonyl chloride;p-Tosyl chloride;p-Toluenesulfonylchloride (8CI);
- EINECS:
- 202-684-8
- Density:
- 1.339 g/cm3
- Melting Point:
- 65-69 °C(lit.)
- Boiling Point:
- 265.3 °C at 760 mmHg
- Flash Point:
- 114.3 °C
- Solubility:
- hydrolyses in water
- Appearance:
- White to yellow solid
- Hazard Symbols:
C- Risk Codes:
- 34-29
- Safety Description:
- 26-36/37/39-45-27 Details
- Transport Information:
- UN 3261 8/PG 2
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Chemistry
IUPAC Name: 4-Methylbenzenesulfonyl chloride
Following is the structure of Tosyl chloride (CAS NO.98-59-9):

Empirical Formula: C7H7ClO2S
Molecular Weight: 190.6473
EINECS: 202-684-8
Index of Refraction: 1.545
Molar Refractivity: 45.02 cm3
Molar Volume: 142.3 cm3
Storage temp.: Store at RT.
Water Solubility: hydrolyses
Density: 1.339 g/cm3
Flash Point: 114.3 °C
Melting point: 65-69 °C(lit.)
Surface Tension: 41 dyne/cm
Enthalpy of Vaporization: 48.3 kJ/mol
Boiling Point: 265.3 °C at 760 mmHg
Vapour Pressure: 0.0151 mmHg at 25 °C
Appearance: White to yellow solid
Solubility of Tosyl chloride (CAS NO.98-59-9): Methylene chloride: 0.2 g/mL, clear
Product Categories of Tosyl chloride (CAS NO.98-59-9): Benzene derivatives; FINE Chemical & INTERMEDIATES; Protection & Derivatization Reagents (for Synthesis); Sulfur Compounds (for Synthesis); Synthetic Organic Chemistry
Canonical SMILES: CC1=CC=C(C=C1)S(=O)(=O)Cl
InChI: InChI=1S/C7H7ClO2S/c1-6-2-4-7(5-3-6)11(8,9)10/h2-5H,1H3
InChIKey: YYROPELSRYBVMQ-UHFFFAOYSA-N
Uses
Tosyl chloride (CAS NO.98-59-9) can be used as analytics reagents,and organic synthesis etc.
Safety Profile
Hazard Codes:
C
Risk Statements 34-29
R34:Causes burns.
R29:Contact with water liberates toxic gas.
Safety Statements 26-36/37/39-45-27
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S27:Take off immediately all contaminated clothing.
RIDADR: UN 3261 8/PG 2
WGK Germany: 1
F: 9-21
Hazard Note: Corrosive
HazardClass: 8
PackingGroup: II
HS Code: 29049020
Hazardous Substances Data: 98-59-9(Hazardous Substances Data)
Specification
Tosyl chloride , its cas register number is 98-59-9. It also can be called 4-Toluene sulfochloride ; 4-Methylbenzenesulfonyl chloride ; p-Toluenesulfonyl chloride ; Toluene-4-sulfonyl chloride ; 4-Toluolsulfonyl chloride ; and p-Tosyl Chloride .

