2-Chlorobenzoic acid

Description

2-Chlorobenzoic acid · CAS 118-91-2 · C7H5ClO2. UNII 8P0867193V. Melting Point: 288 °F (NTP, 1992); Melting Point: 142 °C; Solubility: 2087 mg/l at 25 °C in water.

Identification

CAS Registry Number	118-91-2
PubChem CID	8374
Molecular formula	C7H5ClO2
IUPAC name	2-chlorobenzoic acid
UNII (FDA)	8P0867193V

Computed Descriptors

Molecular Weight	156.56
XLogP3	2.1
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	1
Exact Mass	155.9978071
Monoisotopic Mass	155.9978071
Topological Polar Surface Area	37.3
Heavy Atom Count	10
Formal Charge	0

Physical & Chemical Properties

Melting Point	288 °F (NTP, 1992)
Melting Point	142 °C
Solubility	2087 mg/l at 25 °C in water
Density	1.544 AT 20 °C/4 °C
Vapor Pressure	0.00066 [mmHg]
LogP	log Kow= 2.05
LogP	2.21
Dissociation Constants	PKA 2.89

Physical description & handling notes

• Crystals or fine fluffy white powder. (NTP, 1992)
• Solid; [Merck Index] White powder; [MSDSonline]
• MONOCLINIC PRISMS FROM WATER
• Sublimes (NTP, 1992)
• less than 1 mg/mL at 68 °F (NTP, 1992)
• SOL IN 900 PARTS COLD WATER; MORE SOL IN HOT WATER; FREELY SOL IN ALCOHOL, ETHER.

GHS Hazard Classification

Reported hazard statements	H302 (17.1%), H315 (59.9%), H319 (82.9%), H335 (53.2%), H312 (100%), H314 (100%), H317 (100%), H332 (100%)

Documented Uses

• Used as a preservative (glues and paints) and intermediate (dyes, fungicides, and pharmaceuticals); [HSDB]
• Painting (Pigments, Binders, and Biocides) [Category: Paint]
• Working with Glues and Adhesives [Category: Other]
• PRESERVATIVE FOR GLUES, PAINTS; INTERMEDIATE IN MFR OF FUNGICIDES & DYES
• CHEM INT FOR THIOSALICYLIC ACID
• CHEM INT FOR THIORIDAZINE (HUMAN TRANQUILIZER)

Synonyms

2-Chlorobenzoic acid; 118-91-2; O-CHLOROBENZOIC ACID; Benzoic acid, 2-chloro-; 2-Cba; Benzoic acid, o-chloro-; Kyselina o-chlorbenzoova; DTXSID4024771; NSC-15042; DTXCID304771; 8P0867193V; CHEBI:30793; R300100; RefChem:855217; 204-285-4; CHLOROBENZOIC ACID

Frequently Asked Questions

What are the CAS number and molecular formula of 2-Chlorobenzoic acid?

CAS 118-91-2; molecular formula C7H5ClO2; molecular weight — g/mol.

What other names is 2-Chlorobenzoic acid known by?

2-Chlorobenzoic acid, 118-91-2, O-CHLOROBENZOIC ACID, Benzoic acid, 2-chloro-, 2-Cba, Benzoic acid, o-chloro-.

Is 2-Chlorobenzoic acid classified as hazardous?

Hazard statements reported: H302, H315, H319, H335, H312.

What are the key physical properties of 2-Chlorobenzoic acid?

Melting Point: 288 °F (NTP, 1992); Melting Point: 142 °C; Solubility: 2087 mg/l at 25 °C in water; Density: 1.544 AT 20 °C/4 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.