2,1,3-Benzothiadiazole, 4-chlorosulfonyl

Modify Date: 2026-07-09 17:35:45

2,1,3-Benzothiadiazole, 4-chlorosulfonyl Structure
2,1,3-Benzothiadiazole, 4-chlorosulfonyl structure
Common Name 2,1,3-Benzothiadiazole, 4-chlorosulfonyl
CAS Number 73713-79-8 Molecular Weight 234.683
Density 1.7±0.1 g/cm3 Boiling Point 359.4±15.0 °C at 760 mmHg
Molecular Formula C6H3ClN2O2S2 Melting Point 148 °C
MSDS USA Flash Point 171.2±20.4 °C

 Names

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name 2,1,3-benzothiadiazole-4-sulfonyl chloride
Synonym More Synonyms

 Chemical & Physical Properties

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

Density 1.7±0.1 g/cm3
Boiling Point 359.4±15.0 °C at 760 mmHg
Melting Point 148 °C
Molecular Formula C6H3ClN2O2S2
Molecular Weight 234.683
Flash Point 171.2±20.4 °C
Exact Mass 233.932449
PSA 96.54000
LogP 1.75
Vapour Pressure 0.0±0.8 mmHg at 25°C
Index of Refraction 1.684
InChIKey CXAICGCTHOWKPP-UHFFFAOYSA-N
SMILES O=S(=O)(Cl)c1cccc2nsnc12

 MSDS

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

Name: 2 1 3-Benzothiadiazole-4-sulfonyl chloride 97% Material Safety Data Sheet
Synonym:
CAS: 73713-79-8
Section 1 - Chemical Product MSDS Name:2 1 3-Benzothiadiazole-4-sulfonyl chloride 97% Material Safety Data Sheet
Synonym:

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
73713-79-8 2,1,3-Benzothiadiazole-4-sulfonyl chlo 97% unlisted
Hazard Symbols: C
Risk Phrases: 34

Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Causes burns.Moisture sensitive.
Potential Health Effects
Eye:
Causes eye burns.
Skin:
Causes skin burns.
Ingestion:
Causes gastrointestinal tract burns.
Inhalation:
Causes chemical burns to the respiratory tract.
Chronic:
Not available.

Section 4 - FIRST AID MEASURES
Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.
Skin:
Get medical aid immediately. Immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Do not induce vomiting. Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician:
Treat symptomatically and supportively.

Section 5 - FIRE FIGHTING MEASURES
General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media:
Use foam, dry chemical, or carbon dioxide.

Section 6 - ACCIDENTAL RELEASE MEASURES
General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container.

Section 7 - HANDLING and STORAGE
Handling:
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
Storage:
Store in a cool, dry place. Store in a tightly closed container.
Corrosives area. Store under an inert atmosphere.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
Engineering Controls:
Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low.
Exposure Limits CAS# 73713-79-8: Personal Protective Equipment Eyes: Not available.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES

Physical State: Solid
Color: pale yellow
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 147 - 150 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water:
Specific Gravity/Density:
Molecular Formula: C6H3ClN2O2S2
Molecular Weight: 235

Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Not available.
Conditions to Avoid:
Incompatible materials, exposure to moist air or water.
Incompatibilities with Other Materials:
Strong oxidizing agents, bases, alcohols, amines.
Hazardous Decomposition Products:
Hydrogen chloride, chlorine, nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 73713-79-8: DL0100000 LD50/LC50:
Not available.
Carcinogenicity:
2,1,3-Benzothiadiazole-4-sulfonyl chloride - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION


Section 13 - DISPOSAL CONSIDERATIONS
Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION

IATA
Shipping Name: CORROSIVE SOLID, N.O.S.*
Hazard Class: 8
UN Number: 1759
Packing Group: III
IMO
Shipping Name: CORROSIVE SOLID, N.O.S.
Hazard Class: 8
UN Number: 1759
Packing Group: III
RID/ADR
Shipping Name: CORROSIVE SOLID, N.O.S.
Hazard Class: 8
UN Number: 1759
Packing group: III

Section 15 - REGULATORY INFORMATION

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: C
Risk Phrases:
R 34 Causes burns.
Safety Phrases:
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 36/37/39 Wear suitable protective clothing, gloves
and eye/face protection.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
WGK (Water Danger/Protection)
CAS# 73713-79-8: No information available.
Canada
None of the chemicals in this product are listed on the DSL/NDSL list.
CAS# 73713-79-8 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 73713-79-8 is not listed on the TSCA inventory.
It is for research and development use only.


SECTION 16 - ADDITIONAL INFORMATION
N/A

 Toxicological Information

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

CHEMICAL IDENTIFICATION

RTECS NUMBER :
DL0100000
CHEMICAL NAME :
2,1,3-Benzothiadiazole, 4-chlorosulfonyl-
CAS REGISTRY NUMBER :
73713-79-8
LAST UPDATED :
199612
DATA ITEMS CITED :
1
MOLECULAR FORMULA :
C6-H3-Cl-N2-O2-S2
MOLECULAR WEIGHT :
234.68
WISWESSER LINE NOTATION :
T56 BNSNJ FSWG

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
56 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) Volume(issue)/page/year: NX#05519

 Safety Information

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

Hazard Codes C:Corrosive;
Risk Phrases R34
Safety Phrases S26-S36/37/39
RIDADR 3261
RTECS DL0100000
Packaging Group III
Hazard Class 8
HS Code 2934999090

 Synthetic Route

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

~65%

2,1,3-Benzothiadiazole, 4-chlorosulfonyl Structure

2,1,3-Benzothia...

CAS#:73713-79-8

Learn More
Literature: Belen'kaya, I. A.; Shulla, T. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 11 p. 1303 - 1307 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 11 p. 1555 - 1558

~71%

2,1,3-Benzothiadiazole, 4-chlorosulfonyl Structure

2,1,3-Benzothia...

CAS#:73713-79-8

Learn More
Literature: Dorogov, Mikhail V.; Filimonov, Sergey I.; Kobylinsky, Dmitry B.; Ivanovsky, Sergey A.; Korikov, Pavel V.; Soloviev, Mikhail Y.; Khahina, Maria Y.; Shalygina, Elena E.; Kravchenko, Dmitry V.; Ivachtchenko, Alexandre V. Synthesis, 2004 , # 18 p. 2999 - 3004

~71%

2,1,3-Benzothiadiazole, 4-chlorosulfonyl Structure

2,1,3-Benzothia...

CAS#:73713-79-8

Learn More
Literature: Belen'kaya, I. A.; Shulla, T. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 11 p. 1303 - 1307 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 11 p. 1555 - 1558

 Customs

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

HS Code 2934999090
Summary 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

 Synonyms

This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

MFCD00068049
2,1,3-Benzothiadiazole-4-sulphonyl chloride
2,4-DICHLOROBIPHENYL
4-Chlorosulfonyl-2,1,3-benzothiadiazole
2,1,3-benzothiadiazole-4-sulfonylchloride
Benzo-2,1,3-thiadiazole-4-sulphonyl chloride
Benzo[c][1,2,5]thiadiazole-4-sulfonyl chloride
2,1,3-Benzothiadiazole-4-sulfonyl chloride
benzo[1,2,5]thiadiazole-4-sulfonyl chloride
T56 BNSNJ FSWG
benzo[2,1,3]thiadiazole-4-sulfonyl chloride
2,1,3-Benzothiadiazole,4-chlorosulfonyl
Benzo-2,1,3-thiadiazole-4-sulfonyl chloride
2,1,3-Benzothiadiazol-4-sulfonyl chloride

 2,1,3-Benzothiadiazole, 4-chlorosulfonyl | FAQ

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the safety information for 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: Safety information for 2,1,3-benzothiadiazole-4-sulfonyl chloride: S26-S36/37/39.
Q: What is the melting point of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: Melting point of 2,1,3-benzothiadiazole-4-sulfonyl chloride is 148 °C.
Q: What is the boiling point of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: Boiling point of 2,1,3-benzothiadiazole-4-sulfonyl chloride is 359.4±15.0 °C at 760 mmHg.
Q: What is the polar surface area (PSA) of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: Polar surface area (PSA) of 2,1,3-benzothiadiazole-4-sulfonyl chloride is 96.54000.
Q: What is the molecular weight of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: Molecular weight of 2,1,3-benzothiadiazole-4-sulfonyl chloride is 234.683.
Q: What is the SMILES notation of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: SMILES notation of 2,1,3-benzothiadiazole-4-sulfonyl chloride is O=S(=O)(Cl)c1cccc2nsnc12.
Q: What is the LogP of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: LogP of 2,1,3-benzothiadiazole-4-sulfonyl chloride is 1.75.
Q: What is the InChIKey of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: InChIKey of 2,1,3-benzothiadiazole-4-sulfonyl chloride is CXAICGCTHOWKPP-UHFFFAOYSA-N.
Q: What is the molecular formula of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: Molecular formula of 2,1,3-benzothiadiazole-4-sulfonyl chloride is C6H3ClN2O2S2.
Q: What is the CAS number of 2,1,3-benzothiadiazole-4-sulfonyl chloride?
A: CAS number of 2,1,3-benzothiadiazole-4-sulfonyl chloride is 73713-79-8.

 2,1,3-Benzothiadiazole, 4-chlorosulfonylfactory

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd
Dayang Chem (Hangzhou) Co., Ltd.
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