2-bromo-5-chloro-3-methylbenzo[b]thiophene

Modify Date: 2026-07-07 14:54:11

2-bromo-5-chloro-3-methylbenzo[b]thiophene Structure
2-bromo-5-chloro-3-methylbenzo[b]thiophene structure
Common Name 2-bromo-5-chloro-3-methylbenzo[b]thiophene
CAS Number 175203-60-8 Molecular Weight 261.56600
Density 1.661g/cm3 Boiling Point 336.5ºC at 760mmHg
Molecular Formula C9H6BrClS Melting Point 104 °C
MSDS N/A Flash Point 157.3ºC

 Names

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

Name 2-bromo-5-chloro-3-methylbenzo[b]thiophene
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 1.661g/cm3
Boiling Point 336.5ºC at 760mmHg
Melting Point 104 °C
Molecular Formula C9H6BrClS
Molecular Weight 261.56600
Flash Point 157.3ºC
Exact Mass 259.90600
PSA 28.24000
LogP 4.62560
Vapour Pressure 0.000218mmHg at 25°C
Index of Refraction 1.685
InChIKey RWFPSUKDYYBMHU-UHFFFAOYSA-N
SMILES Cc1c(Br)sc2ccc(Cl)cc12

 MSDS

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

Name: 2-Bromo-5-chloro-3-methylbenzo[b]thiophene 97% Material Safety Data Sheet
Synonym:
CAS: 175203-60-8
Section 1 - Chemical Product MSDS Name:2-Bromo-5-chloro-3-methylbenzo[b]thiophene 97% Material Safety Data Sheet
Synonym:

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
175203-60-8 2-Bromo-5-chloro-3-methylbenzo[b]thiop 97% unlisted
Hazard Symbols: XI
Risk Phrases: 36/37/38

Section 3 - HAZARDS IDENTIFICATION
EMERGENCY OVERVIEW
Irritating to eyes, respiratory system and skin.
Potential Health Effects
Eye:
Causes eye irritation.
Skin:
Causes skin irritation. May be harmful if absorbed through the skin.
Ingestion:
May cause irritation of the digestive tract. May be harmful if swallowed.
Inhalation:
Causes respiratory tract irritation. May be harmful if inhaled.
Chronic:
Not available.

Section 4 - FIRST AID MEASURES
Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Get medical aid. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
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 water spray, dry chemical, carbon dioxide, or chemical foam.

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:
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.
Storage:
Store in a cool, dry place. Store in a tightly closed container.

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# 175203-60-8: 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: white crystalline solid
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: Not available.
Freezing/Melting Point: 104 - 107 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: C9H6BrClS
Molecular Weight: 262

Section 10 - STABILITY AND REACTIVITY
Chemical Stability:
Not available.
Conditions to Avoid:
Incompatible materials.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Hydrogen chloride, chlorine, carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen bromide, bromine.
Hazardous Polymerization: Has not been reported

Section 11 - TOXICOLOGICAL INFORMATION
RTECS#:
CAS# 175203-60-8 unlisted.
LD50/LC50:
Not available.
Carcinogenicity:
2-Bromo-5-chloro-3-methylbenzo[b]thiophene - Not listed by ACGIH, IARC, or NTP.

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
No information available.
IMO
No information available.
RID/ADR
No information available.

Section 15 - REGULATORY INFORMATION

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: XI
Risk Phrases:
R 36/37/38 Irritating to eyes, respiratory system
and skin.
Safety Phrases:
S 26 In case of contact with eyes, rinse immediately
with plenty of water and seek medical advice.
S 37/39 Wear suitable gloves and eye/face
protection.
WGK (Water Danger/Protection)
CAS# 175203-60-8: No information available.
Canada
None of the chemicals in this product are listed on the DSL/NDSL list.
CAS# 175203-60-8 is not listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 175203-60-8 is not listed on the TSCA inventory.
It is for research and development use only.


SECTION 16 - ADDITIONAL INFORMATION
N/A

 Safety Information

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

Hazard Codes Xi:Irritant;
Risk Phrases R36/37/38
Safety Phrases S26-S36/37/39
HS Code 2934999090

 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%

 Bioassay

View more

This table contains target information, in‑vitro & in‑vivo assay data for this compound.

Name: Dicer-mediated maturation of pre-microRNA
Source: Center for Chemical Genomics, University of Michigan
Target: N/A
External Id: TargetID_659_CEMA
Name: Screen for inhibitors of RMI FANCM (MM2) intereaction
Source: 11908
Target: N/A
External Id: RMI-FANCM-MM2
Name: Inhibitors of CDC25B-CDK2/CyclinA interaction
Source: Center for Chemical Genomics, University of Michigan
External Id: MScreen:TargetID_600
Name: The chemical genetic matrix (CGM) dataset as reported in Wildenhain et al. (2015) Pre...
Source: 11924
Target: N/A
External Id: CGM data for Cell Systems paper Dec 2015
Total 4, Current Page 1 of 1
1

 Synonyms

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

2-Bromo-5-chloro-3-methylbenzo(b)thiophene
2-bromo-5-chloro-3-methyl-1-benzothiophene
2-Bromo-5-chloro-3-methylbenzo[b]thiophene
MFCD00126363

  | FAQ

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

Q: What is the polar surface area (PSA) of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: Polar surface area (PSA) of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is 28.24000.
Q: What English synonyms does 2-bromo-5-chloro-3-methylbenzo[b]thiophene have?
A: English synonyms of 2-bromo-5-chloro-3-methylbenzo[b]thiophene: 2-Bromo-5-chloro-3-methylbenzo(b)thiophene, 2-bromo-5-chloro-3-methyl-1-benzothiophene, 2-Bromo-5-chloro-3-methylbenzo[b]thiophene, MFCD00126363.
Q: What is the InChIKey of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: InChIKey of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is RWFPSUKDYYBMHU-UHFFFAOYSA-N.
Q: What is the SMILES notation of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: SMILES notation of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is Cc1c(Br)sc2ccc(Cl)cc12.
Q: What is the safety information for 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: Safety information for 2-bromo-5-chloro-3-methylbenzo[b]thiophene: S26-S36/37/39.
Q: What is the melting point of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: Melting point of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is 104 °C.
Q: What is the molecular weight of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: Molecular weight of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is 261.56600.
Q: What is the LogP of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: LogP of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is 4.62560.
Q: What is the CAS number of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: CAS number of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is 175203-60-8.
Q: What is the boiling point of 2-bromo-5-chloro-3-methylbenzo[b]thiophene?
A: Boiling point of 2-bromo-5-chloro-3-methylbenzo[b]thiophene is 336.5ºC at 760mmHg.

 factory

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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