苯并咪唑

Description

Benzimidazole · CAS 51-17-2 · C7H6N2. UNII E24GX49LD8. Boiling Point: >360 °C; Melting Point: 338 to 342 °F (NTP, 1992); Melting Point: 170.5.

Identification

CAS Registry Number	51-17-2
PubChem CID	5798
Molecular formula	C7H6N2
IUPAC name	1H-benzimidazole
UNII (FDA)	E24GX49LD8

Computed Descriptors

Molecular Weight	118.14
XLogP3	1.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	118.053098200
Monoisotopic Mass	118.053098200
Topological Polar Surface Area	28.7
Heavy Atom Count	9
Formal Charge	0

Physical & Chemical Properties

Boiling Point	>360 °C
Melting Point	338 to 342 °F (NTP, 1992)
Melting Point	170.5
Melting Point	170.5 °C
Solubility	2010
Solubility	In water, 2.01X10+3 mg/l @ 30 °C
Vapor Pressure	0.0000764 [mmHg]
LogP	1.32
LogP	log Kow= 1.32
LogP	1.53

Physical description & handling notes

• Benzimidazole appears as white tabular crystals. (NTP, 1992)
• Solid; Soluble in hot water; [Merck Index] Slightly water solubility = 2 g/L at 20 deg C; [ChemIDplus] Off-white or tan powder; [MSDSonline]
• RHOMBIC, BIPYRAMIDAL PLATES IN WATER
• Tabular crystals
• Othrorombic and monoclinic modifications
• greater than 680 °F at 760 mmHg (NTP, 1992)

Regulatory Status

GHS notification summary	3.9% (6 / 153)

GHS Hazard Classification

GHS notification summary	3.9% (6 / 153)
Reported hazard statements	H302 (92.8%)

Documented Uses

• A group of systemic fungicides /Benzimidazoles/
• Prepd by reaction of o-phenylenediamine with formic acid: Wundt, Ber 11, 826 (1878); Wagner, Millett, Org Syn Coll Vol II, 65 (1943).
• EFFECTIVE AGENT TO PREVENT TOXIC EFFECT OF AIR POLLUTANTS, SUCH AS OXIDANTS, ON PLANTS.
• Agents that kill parasitic worms. They are used therapeutically in the treatment of HELMINTHIASIS in man and animal.
• 5-HYDROXYBENZIMIDAZOLE IS A MAJOR URINARY METABOLITE OF BENZIMIDAZOLE IN RAT.
• SIXTY DAYS AFTER TREATMENT WITH BENZIMIDAZOLE, MELON PLANTS CONTAINED METABOLITES 2-AMINOBENZONITRILE, O-PHENYLENEDIAMINE, ANILINE

Synonyms

BENZIMIDAZOLE; 51-17-2; 1H-Benzimidazole; Benzoimidazole; 1,3-Benzodiazole; Benziminazole; 3-Azaindole; o-Benzimidazole; Benzoglyoxaline; Azindole; 1,3-Diazaindene; N,N'-Methenyl-o-phenylenediamine; NSC 759; DTXSID8024573; NSC-759; E24GX49LD8

Frequently Asked Questions

What are the CAS number and molecular formula of Benzimidazole?

CAS 51-17-2; molecular formula C7H6N2; molecular weight — g/mol.

What other names is Benzimidazole known by?

BENZIMIDAZOLE, 51-17-2, 1H-Benzimidazole, Benzoimidazole, 1,3-Benzodiazole, Benziminazole.

Is Benzimidazole classified as hazardous?

3.9% of GHS notifications report no hazard classification (6 of 153).

What are the key physical properties of Benzimidazole?

Boiling Point: >360 °C; Melting Point: 338 to 342 °F (NTP, 1992); Melting Point: 170.5; Melting Point: 170.5 °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.