2-Chlorobenzoic acid
- CAS No.
- 118-91-2
- Chemical Name:
- 2-Chlorobenzoic acid
- Synonyms
- OCBA;O-CHLOROBENZOIC ACID;2-CBA;2-chlorobenzoic;2-chlorobenzoate;2-Chlorobenzoic acid, 99%;NSC 32737;NSC 15042;2-Chlorobenzoi;orobenzoic acid
- CBNumber:
- CB6463683
- Molecular Formula:
- C7H5ClO2
- Molecular Weight:
- 156.57
- MDL Number:
- MFCD00002412
- MOL File:
- 118-91-2.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | 138-140 °C (lit.) |
|---|---|
| Boiling point | 285 °C |
| Density | 1.544 |
| vapor pressure | 0.001 hPa (25 °C) |
| refractive index | 1.5812 (estimate) |
| Flash point | 173 °C |
| storage temp. | Store below +30°C. |
| solubility | cold water: soluble900 part |
| pka | 2.92(at 25℃) |
| form | Powder |
| color | White to off-white |
| PH | 3.4 (0.2g/l, H2O, 20℃) |
| Water Solubility | soluble in hot water |
| Merck | 14,2124 |
| BRN | 907340 |
| Henry's Law Constant | 1.5×102 mol/(m3Pa) at 25℃, Duchowicz et al. (2020) |
| Stability | Stable, combustible. Incompatible with strong bases, strong oxidizing agents. |
| InChI | 1S/C7H5ClO2/c8-6-4-2-1-3-5(6)7(9)10/h1-4H,(H,9,10) |
| InChIKey | IKCLCGXPQILATA-UHFFFAOYSA-N |
| SMILES | OC(=O)c1ccccc1Cl |
| CAS DataBase Reference | 118-91-2(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | 8P0867193V |
| NIST Chemistry Reference | Benzoic acid, 2-chloro-(118-91-2) |
| EPA Substance Registry System | o-Chlorobenzoic acid (118-91-2) |
| UNSPSC Code | 41116107 |
| NACRES | NA.24 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319 | |||||||||
| Precautionary statements | P264-P280-P302+P352-P305+P351+P338-P332+P313-P337+P313 | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36-36/37/38 | |||||||||
| Safety Statements | 26-37/39 | |||||||||
| WGK Germany | 2 | |||||||||
| RTECS | DG4976000 | |||||||||
| Autoignition Temperature | 530 °C | |||||||||
| Hazard Note | Irritant | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29163900 | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazard Classifications | Eye Irrit. 2 Skin Irrit. 2 |
|||||||||
| Hazardous Substances Data | 118-91-2(Hazardous Substances Data) | |||||||||
| Toxicity | LD50 orally in Rabbit: 2465 mg/kg | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
2-Chlorobenzoic acid price More Price(47)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 135577 | 2-Chlorobenzoic acid 98% | 118-91-2 | 5g | $32.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | 135577 | 2-Chlorobenzoic acid 98% | 118-91-2 | 100g | $42.3 | 2026-04-30 | Buy |
| Sigma-Aldrich | PHR3330 | 2-Chlorobenzoic acid certified reference material, pharmaceutical secondary standard | 118-91-2 | 50 mg | $804 | 2026-04-30 | Buy |
| TCI Chemical | C0133 | 2-Chlorobenzoic Acid >98.0%(GC)(T) | 118-91-2 | 25g | $27 | 2026-04-30 | Buy |
| TCI Chemical | C0133 | 2-Chlorobenzoic Acid >98.0%(GC)(T) | 118-91-2 | 500g | $53 | 2026-04-30 | Buy |
2-Chlorobenzoic acid Chemical Properties,Uses,Production
Description
2-Chlorobenzoic acid is an organic compound with the formula ClC6H4CO2H. It is one of three isomeric chlorobenzoic acids, the one that is the strongest acid. This white solid is used as a precursor to a variety of drugs, food additives, and dyes.
Chemical Properties
2-chlorobenzoic acid is a white to pale cream crystals or powder, It is insoluble in water, 95% ethanol solution and toluene solution, soluble in methanol, anhydrous ethanol, ether, acetone and benzene.It is the intermediate of fungicide flubenthrinol, insecticide mirex and bollenuron, and acaricide tetrabenazine.
Uses
The toxicity of halogenated benzoic acids was found to be directly related to the compound's hydrophobicity. Toxicity and quantitative structure-activity relationships of benzoic acids to Pseudokirchn eriella subcapitata.
Uses
Preservative for glues, paints. Intermediate in the manufacture of fungicides and dyes.
Uses
2-Chlorobenzoic acid was used to study the degradation of 2-bromobenzoic acid by Pseudomonas aeruginosa.
Preparation
It is prepared by the oxidation of 2-chlorotoluene. The laboratory scale reaction employs potassium permanganate. Alternatively it arises by the hydrolysis of α,α,α-trichloro-2-toluene.
The chloride is readily replaced by ammonia to 2-aminobenzoic acid. At elevated temperature it decarboxylates.
Definition
ChEBI: 2-chlorobenzoic acid is a monochlorobenzoic acid having the chloro group at the 2-position. It has a role as a plant hormone and a plant metabolite. It is a monochlorobenzoic acid and a 2-halobenzoic acid. It is a conjugate acid of a 2-chlorobenzoate.
Synthesis Reference(s)
The Journal of Organic Chemistry, 44, p. 1247, 1979 DOI: 10.1021/jo01322a012
Tetrahedron Letters, 35, p. 1539, 1994 DOI: 10.1016/S0040-4039(00)76752-9
General Description
Crystals or fine fluffy white powder.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
2-Chlorobenzoic acid is incompatible with strong oxidizing agents and strong bases.
Fire Hazard
Flash point data for 2-Chlorobenzoic acid are not available; however, 2-Chlorobenzoic acid is probably combustible.
Purification Methods
Crystallise the acid successively from glacial acetic acid, aqueous EtOH, and pet ether (b 60-80o). Other solvents include hot water or toluene (ca 4mL/g). The crude material can be initially purified by dissolving 30g in 100mL of hot water containing 10g of Na2CO3, boiling with 5g of charcoal for 15minutes, then filtering and adding 31mL of 1:1 aqueous HCl. The precipitate is washed with a little water and dried at 100o. [Beilstein 9 IV 956.]
Toxics Screening Level
The lTSL for o-chlorobenzoic acid has been changed from 0.04 μg/m3 to 0.1 μg/m3 based on an annual averaging time.
2-Chlorobenzoic acid Preparation Products And Raw materials
Raw materials
1of4
Preparation Products
1of4
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shandong Vantage Specialty Chemicals Biotechnology Co., Ltd. | 13396369453 18678026865 | sdfantai@163.com | China | 904 | 58 |
| WUHAN GLORY CO.,LTD. | 27-27-59263629 18607197940 | sales08@glorywh.com | China | 81 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| future industrial shanghai co., ltd | 400-0066400 13621662912 | sales@jonln.com | China | 1989 | 65 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TAIYUAN RHF CO.,LTD. | +86 351 7031519 | sales@RHFChem.com | China | 2334 | 56 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| ShangHai DEMO Chemical Co.,Ltd | 400-021-7337 2355568890 | sales@demochem.com | China | 2569 | 57 |
| Beijing dtftchem Technology Co., Ltd. | 010-60275820 13031183356 | elainezt@sina.com | China | 1386 | 62 |
Related articles
- Synthesis, Medicinal Derivatives and Environmental Photodegradation of 2-Chlorobenzoic Acid
- 2-Chlorobenzoic acid is a sublimable white powder, a key intermediate for drugs, pesticides and dyes, soluble in alcohols and ....
- Jul 24,2026
View Lastest Price from 2-Chlorobenzoic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-12 | o-Chlorobenzoic acid
118-91-2
|
0.99 | RongNa Biotechnology Co.,Ltd | ||||
 |
2026-09-11 | 2-Chlorobenzoic acid
118-91-2
|
$70.00-100.00 | 1kg | 99% | 5000 | HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | |
 |
2026-09-11 | 2-Chlorobenzoic acid
118-91-2
|
$10.00 | 1KG | 99% | 300MT/year | Speranza Chemical Co., Ltd. |
-
- o-Chlorobenzoic acid
118-91-2
- 0.99
- RongNa Biotechnology Co.,Ltd
-
- 2-Chlorobenzoic acid
118-91-2
- $70.00-100.00
- 99%
- HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
-
- 2-Chlorobenzoic acid
118-91-2
- $10.00
- 99%
- Speranza Chemical Co., Ltd.
