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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 7383Generated: October 23, 2026

Benzenesulfonyl chloride, 3,4-dichloro-

3,4-DICHLOROBENZENES · 3,4-Dichlorophenylsulfonyl chloride · 3,4-dichloro-benzenesulfonylchlorid · 3,4-DICHLOROBENZENESULFONYL CHLORIDE · 3,4-DICHLOROBENZENESULPHONYL CHLORIDE · 3,4-DichlorobenzenesulfonylChloride>Benzenesulfonyl chloride, 3,4-dichloro- · 3,4-dichlorobenzene-1-sulfonyl chloride · 3,4-Dichlorobenzenesulfonyl chloride,98%

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Benzenesulfonyl chloride, 3,4-dichloro- molecular structure

Identifiers & Physical Properties

CAS No.98-31-7
Molecular formulaC6H3Cl3O2S
Average molar mass245.5 g/mol
Monoisotopic mass243.89193338 g/mol
SMILESO=S(=O)(Cl)c1ccc(Cl)c(Cl)c1
InChIKeyNYIBPWGZGSXURD-UHFFFAOYSA-N
PubChem CID7383
EC No.202-656-5
DTXSIDDTXSID5059165

Chemical & Physical Properties

XLogP3.4
Topological polar surface area42.5
Hydrogen bond donors0
Hydrogen bond acceptors2
Rotatable bonds1
Heavy atoms12
Formal charge0
Complexity246
SpringerMaterials PropertiesNuclear quadrupole resonance spectroscopy
Melting point20-22°C
Boiling point253 °C(lit.)
Density1.572 g/mL at 25 °C(lit.)
Refractive indexn20/D 1.589(lit.)
Flash point135 °F
Storage conditionsInert atmosphere,Room Temperature
Physical statepowder to lump to clear liquid
ColorWhite or Colorless to Almost white or Almost colorless
SensitivityMoisture Sensitive
BRN1956417
InChI1S/C6H3Cl3O2S/c7-5-2-1-4(3-6(5)8)12(9,10)11/h1-3H
InChIKeyNYIBPWGZGSXURD-UHFFFAOYSA-N
SMILESClc1ccc(cc1Cl)S(Cl)(=O)=O
CAS DataBase Reference98-31-7(CAS DataBase Reference)
FDA UNIIAX3AD43WDD
EPA Substance Registry SystemBenzenesulfonyl chloride, 3,4-dichloro- (98-31-7)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS02,GHS05
Signal wordDanger
GHS hazard statementsH226-H314
GHS precautionary statementsP210-P233-P240-P280-P303+P361+P353-P305+P351+P338
Personal protective equipment (PPE)Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Hazard symbolsC
Risk statements (R)34
Safety statements (S)26-27-28-36/37/39-45
UN transport numberUN 2920 8/PG 2
Water hazard class (WGK)3
Hazard NoteCorrosive/Moisture Sensitive
TSCA inventory statusTSCA listed
Hazard class8Flam. Liq. 3Skin Corr. 1B
Packing groupII
Customs code29049090
Storage class3 - Flammable liquids
Limited quantities1 Kg (2.2 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)

Safety & Regulations

GHS classificationDangerH226 (83.7%): Flammable liquid and vapor [Warning Flammable liquids]P210, P233, P240, P241, P242, P243, P260, P264, P280, P301+P330+P331, P302+P361+P354, P303+P361+P353, P304+P340, P305+P354+P338, P316, P321, P363, P370+P378, P403+P235, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 49 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard Classes and CategoriesFlam. Liq. 3 (83.7%)
Personal protective equipment (PPE)Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
Water hazard class (WGK)3
TSCA inventory statusTSCA listed
UN transport numberUN 2920 8/PG 2
Customs code29049090
Risk statements (R)34
Signal wordDanger
GHS pictogramGHS02,GHS05
Hazard symbolsC
hazard_noteCorrosive/Moisture Sensitive
Safety statements (S)26-27-28-36/37/39-45
Hazard class8Flam. Liq. 3Skin Corr. 1B
Storage class3 - Flammable liquids
Packing groupII
GHS hazard statementsH226-H314
Limited quantities1 Kg (2.2 lbs) (solid)
Excepted quantitiesMax Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)
GHS precautionary statementsP210-P233-P240-P280-P303+P361+P353-P305+P351+P338

Applications & Uses

Description

3,4-Dichlorobenzenesulfonyl Chloride, fp 22.4℃, is manufactured from o-dichlorobenzene and chlorosulfuric acid; used as an inexpensive acylating agent.

Uses

3,4-Dichloro-benzenesulfonyl Chloride is a useful reagent for organic synthesis.