2-chlorobenzoic acid
CAS No.: 118-91-2 Formula: C7H5ClO2 Molecular Weight: 156.56600
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2-chlorobenzoic acid

CAS No.: 118-91-2 Formula: C7H5ClO2 Molecular Weight: 156.56600
Suppliers: All (236) China Suppliers (144) Price Available (49) Contractor (11)


2-Chlorobenzoic acid is a simple organic compound which can be used as a chemical building block. It may be synthesized by the oxidation of 2-chlorotoluene with potassium permanganate.
It can be synthesized by diazotization. It follows Sandmeyer reaction.
It is irritant for the respiratory system and eyes.

Basic Info

Chemical Name 2-chlorobenzoic acid

ortho-chlorobenzoic acid; 2-Cba; O-CHLORO BENZOIC ACID; OCBA; Mesalamine Impurity L; o-chlorobenzoic acid; 2-Chlorobenzoic acid; Benzoic acid,o-chloro; 2-chloro-benzoic acid; Benzoic acid, 2-chloro-; Expand

CAS No. 118-91-2
Molecular Formula C7H5ClO2
Molecular Weight 156.56600
PSA 37.30000
LogP 2.03820


Appearance & Physical State white crystals or powder
Density 1.544
Boiling Point 285ºC
Melting Point 139-143ºC
Flash Point 173ºC
Water Solubility soluble in hot water
Stability Stable, combustible. Incompatible with strong bases, strong oxidizing agents.
Storage Condition Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Vapor Pressure 0.00242mmHg at 25°C

Safety Info

RTECS DG4976000
Safety Statements S26-S37/39
HS Code 29163900
WGK Germany 2
Risk Statements R36/37/38
Hazard Codes Xi
SDS 1.0 Expand

SDS 1.0

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According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 10, 2017

Revision Date: Aug 10, 2017


1.1 GHS Product identifier

Product name 2-chlorobenzoic acid

1.2 Other means of identification

Product number -
Other names 2-Cba

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

Company MOLBASE (Shanghai) Biotechnology Co., Ltd.
Address Floor 4 & 5, Building 12, No. 1001 North Qinzhou Road,
Xuhui District, Shanghai, China
Telephone +86(21)64956998
Fax +86(21)54365166

1.5 Emergency phone number

Emergency phone number +86-400-6021-666
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Oral, Category 4

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H302 Harmful if swallowed

Precautionary statement(s)

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.


P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/…if you feel unwell.

P330 Rinse mouth.




P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification


3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
2-chlorobenzoic acid 2-chlorobenzoic acid 118-91-2 none 100%

4.First-aid measures

4.1 Description of necessary first-aid measures

General advice

Consult a physician. Show this safety data sheet to the doctor in attendance.

If inhaled

If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.

In case of skin contact

Wash off with soap and plenty of water. Consult a physician.

In case of eye contact

Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.

If swallowed

Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

4.2 Most important symptoms/effects, acute and delayed

SYMPTOMS: Symptoms resulting from exposure to this chemical include skin and eye irritation. ACUTE/CHRONIC HAZARDS: This compound may be harmful by inhalation, ingestion or skin absorption. It is irritating to eyes, skin, mucous membranes and the upper respiratory tract. When heated to decomposition this compound emits toxic fumes.

4.3 Indication of immediate medical attention and special treatment needed, if necessary

no data available

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.

5.2 Specific hazards arising from the chemical

Flash point data for this compound are not available; however, it is probably combustible.

5.3 Special protective actions for fire-fighters

Wear self-contained breathing apparatus for firefighting if necessary.

6.Accidental release measures

6.1 Personal precautions, protective equipment and emergency procedures

Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

6.2 Environmental precautions

Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.

6.3 Methods and materials for containment and cleaning up

Pick up and arrange disposal. Sweep up and shovel. Keep in suitable, closed containers for disposal.

7.Handling and storage

7.1 Precautions for safe handling

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

7.2 Conditions for safe storage, including any incompatibilities

Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

no data available

Biological limit values

no data available

8.2 Appropriate engineering controls

Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

8.3 Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Skin protection

Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

Respiratory protection

Wear dust mask when handling large quantities.

Thermal hazards

no data available

9.Physical and chemical properties

Physical state white crystals or powder
Odour no data available
Melting point/ freezing point 160°C(lit.)
Boiling point or initial boiling point and boiling range 142°C
Flammability no data available
Lower and upper explosion limit / flammability limit no data available
Flash point 56°C(lit.)
Auto-ignition temperature no data available
Decomposition temperature no data available
pH no data available
Kinematic viscosity no data available
Solubility In water:soluble in hot water
Partition coefficient n-octanol/water (log value) log Kow= 2.05
Vapour pressure 0.00242mmHg at 25°C
Density and/or relative density 1.544
Relative vapour density no data available
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Stable under recommended storage conditions.

10.3 Possibility of hazardous reactions

O-CHLOROBENZOIC ACID is incompatible with strong oxidizing agents and strong bases.

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

no data available

10.6 Hazardous decomposition products

no data available

11.Toxicological information

Acute toxicity

  • Oral: LD50 Rabbit oral > 500 mg/kg.
  • Inhalation: no data available
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available


no data available

Reproductive toxicity

no data available

STOT-single exposure

no data available

STOT-repeated exposure

no data available

Aspiration hazard

no data available

12.Ecological information

12.1 Toxicity

  • Toxicity to fish: no data available
  • Toxicity to daphnia and other aquatic invertebrates: no data available
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

In a survey of standarized tests, o-chlorobenzoic acid was found to biodegrade in the coupled units test, the Zahn-Wellens test, the MITI test, the Sturm test, the OECD screening test and the trickling filter test but not in the closed bottle test or the AFNOR test(1-4). o-Chlorobenzoic acid was listed as a compound amenable to biodegradation under aerobic conditions(5). o-Chlorobenzoic acid at a concn of 100 mg/L underwent oxidation, as measured by oxygen uptake, when inoculated with microorganisms isolated from soil, compost, or mud obtained from a catalytic cracking plant waste lagoon(6). It underwent 100% removal after 96 hrs when incubated with a mixed microbial seed under aerobic conditions(7). o-Chlorobenzoic acid at a concn of 16 mg/L had a lag perod of 25 days when treated with wastewater sludge supernatant and 14-25 days when inoculated with soil; in the presence of glucose, complete disappearance of 8.4 mg/L o-chlorobenzoic acid was observed within 6 days with the wastewater inoculum(8).

12.3 Bioaccumulative potential

Estimated bioconcentration factors of 8 and 21(SRC) obtained from o-chlorobenzoic acid's water solubility, 2087 mg/L at 25°C(2), and octanol/water partition coefficient, 2.05(3), respectively, can be obtained using a appropriate regression equation. These values indicate that it will not significantly bionconcentrate in fish and aquatic organisms(SRC).

12.4 Mobility in soil

Estimated soil adsorption coefficients of 65 and 310(1,SRC) obtained from o-chlorobenzoic acid's water solubility, 2087 mg/L at 25°C(2), and octanol/water partition coefficient, 2.05(3), respectively, can be obtained using an appropriate regression equation. These values indicate that it will display moderate to high mobility in soil(4).

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods


The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

14.Transport information

14.1 UN Number

ADR/RID: UN2282 IMDG: UN2282 IATA: UN2282

14.2 UN Proper Shipping Name


14.3 Transport hazard class(es)


14.4 Packing group, if applicable


14.5 Environmental hazards

ADR/RID: no IMDG: no IATA: no

14.6 Special precautions for user

no data available

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

no data available

15.Regulatory information

15.1 Safety, health and environmental regulations specific for the product in question

Chemical name Common names and synonyms CAS number EC number
2-chlorobenzoic acid 2-chlorobenzoic acid 118-91-2 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Listed.
China Catalog of Hazardous chemicals 2015 Not Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
Vietnam National Chemical Inventory Not Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 10, 2017
Revision Date Aug 10, 2017

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%


  • IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
  • HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
  • IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
  • CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
  • ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
  • Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
  • ECHA - European Chemicals Agency, website: https://echa.europa.eu/

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.
MSDS Expand
1H NMR : 400 MHz in DMSO-d6Expand

NMR Spectrum 1H NMR : 400 MHz in DMSO-d6


C7 H5 Cl O2 0.032 g : 0.5 ml DMSO-d6
o-chlorobenzoic acid

Assign. Shift(ppm)
A 13.43
B 7.808
C 7.56
D 7.55
E 7.447

IR : nujol mullExpand
Mass Expand
Raman : 4880 A,100M,powderExpand
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