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2-AMINOBENZIMIDAZOLE
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Name

2-AMINOBENZIMIDAZOLE

 EINECS 213-280-6
CAS No. 934-32-7 Density 1.367 g/cm3
PSA 54.70000 LogP 1.72630
Solubility Soluble in water (Slightly). Melting Point 226-230 °C(lit.)
Formula C7H7N3 Boiling Point 368.9 °C at 760 mmHg
Molecular Weight 133.153 Flash Point 204.6 °C
Transport Information N/A Appearance light yellow to cream or beige powder or flakes
Safety 26-36/37/39-22 Risk Codes 22-36/37/38-43
Molecular Structure Molecular Structure of 934-32-7 (2-Aminobenzimidazole) Hazard Symbols HarmfulXn
Synonyms

Benzimidazole,2-amino- (6CI,7CI,8CI);1H-Benzimidazol-2-ylamine;2-Amino-1H-benzimidazole;2-Benzimidazolamine;2-Benzimidazolylamine;2-Iminobenzimidazoline;NSC 27793;NSC 7628;

Article Data 94

2-AMINOBENZIMIDAZOLE Synthetic route

1516-74-1

2-azido-1H-benzo[d]imidazole

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
With sodium tetrahydroborate; tin bis(1,2-benzenethiolate) In tetrahydrofuran; phosphate buffer at 10℃; for 0.5h; pH=10; Reduction;100%
With dibutyltin In benzene at 40℃; for 2h; other reagents;98%
With acetic acid In dichloromethane at 20℃; for 2h; Irradiation;
506-68-3

bromocyane

95-54-5

1,2-diamino-benzene

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
In methanol; water at 20 - 60℃; Inert atmosphere;97%
In ethanol; water at 70℃; for 1h;90%
In methanol; water at 50℃; for 1h;89%
1184-90-3

aminoiminomethanesulfonic acid

95-54-5

1,2-diamino-benzene

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
In isopropyl alcohol at 60℃;95%
77287-34-4, 77287-35-5, 60100-09-6

formamide

95-54-5

1,2-diamino-benzene

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
With N-sulfonated biguanidine modified silica coated on cobalt ferrite nanoparticle core In ethanol at 20℃; for 0.3h; Green chemistry;92%

cyanogen bromide

95-54-5

1,2-diamino-benzene

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
In methanol; water at 20℃; for 24h;88%
In water at 20℃;75%

N-(1H-benzimidazol-2-yl)-N'-(p-methylbenzylidene)hydrazine

A

934-32-7

1H-benzimidazol-2-amine

B

104-85-8

para-methylbenzonitrile

Conditions
ConditionsYield
at 700℃; under 0.02 Torr; Gas phase;A 85%
B 86%

N-(1H-benzimidazol-2-yl)-N'-(p-methoxybenzylidene)hydrazine

A

934-32-7

1H-benzimidazol-2-amine

B

874-90-8

4-methoxybenzonitrile

Conditions
ConditionsYield
at 700℃; under 0.02 Torr; Gas phase;A 78%
B 85%
506-68-3

bromocyane

615-28-1

o-phenylenediamine dihydrochloride

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
Stage #1: bromocyane; o-phenylenediamine dihydrochloride With sodium hydrogencarbonate In water; acetonitrile at 0 - 20℃;
Stage #2: With sodium carbonate In water; acetonitrile		85%
6306-71-4

lobendazole

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
In N,N-dimethyl-formamide for 4h; Heating;82%
1438395-75-5

N-tert-butyl-1H-benzo[d]imidazol-2-amine

934-32-7

1H-benzimidazol-2-amine

Conditions
ConditionsYield
With hydrogenchloride In water for 12h; Reflux;82%

2-AMINOBENZIMIDAZOLE Chemical Properties

The Molecular formula of 2-AMINOBENZIMIDAZOLE(934-32-7): C7H7N3
The Molecular Weight of 2-AMINOBENZIMIDAZOLE(934-32-7): 133.15
Molecular Structure:
EINECS: 213-280-6
Melting point: 226-230 °C(lit.)
Boiling Point: 368.9 °C at 760 mmHg 
Flash Point: 204.6 °C 
Index of Refraction: 1.78 
Molar Refractivity: 40.85 cm3 
Molar Volume: 97.3 cm3 
Polarizability: 16.19 10-24 cm3 
Surface Tension: 79.4 dyne/cm 
Density: 1.367 g/cm3 
Enthalpy of Vaporization: 61.56 kJ/mol 
Vapour Pressure: 1.23E-05 mmHg at 25°C 
IUPAC Name: 1H-benzimidazol-2-amine
Synonyms: 2-Iminobenzimidazoline;Benzimidazole, 2-amino-;2-amino-benzimidazol;USAF ek-4037;usafek-4037;2-BENZIMIDAZOLAMINE;2-BENZIMIDAZOLYLAMINE;2-AMINOBENZIMIDAZOLE;

2-AMINOBENZIMIDAZOLE Toxicity Data With Reference

1.   

mma-sat 710 µmol/L

   ENMUDM    Environmental Mutagenesis. 3 (1981),11.
2.   

mmo-sat 100 µg/plate

   MUREAV    Mutation Research. 15 (1972),273.
3.   

orl-rat TDLo:426 mg/kg (8-15D preg):TER

   THERAP    Therapie. 31 (1976),505.
4.   

orl-rat LDLo:500 mg/kg

   NCNSA6    National Academy of Sciences, National Research Council, Chemical-Biological Coordination Center, Review. 5 (1953),22.
5.   

orl-mus LD40:600 mg/kg

   JACSAT    Journal of the American Chemical Society. 67 (1945),905.
6.   

ipr-mus LD50:100 mg/kg

   NTIS**    National Technical Information Service. (Springfield, VA 22161) (Formerly U.S. Clearinghouse for Scientific and Technical Information) AD277-689 .
7.   

ivn-mus LD50:126 mg/kg

   29QHAQ    Principles of Medicinal Chemistry Foye, W.O., eds.,Philadelphia, PA.: Lea and Febiger,1974,246.

2-AMINOBENZIMIDAZOLE Consensus Reports

Reported in EPA TSCA Inventory.

2-AMINOBENZIMIDAZOLE Safety Profile

Poison by intravenous and intraperitoneal routes. Moderately toxic by ingestion. An experimental teratogen. Mutation data reported. When heated to decomposition it emits toxic NOx. See also AROMATIC AMINES.
The Hazard Codes of 2-AMINOBENZIMIDAZOLE(934-32-7):  Xn
The Risk Statements information of 2-AMINOBENZIMIDAZOLE(934-32-7):
22:  Harmful if swallowed 
43:  May cause sensitization by skin contact 
36/37/38:  Irritating to eyes, respiratory system and skin 
The Safety Statements information of 2-AMINOBENZIMIDAZOLE(934-32-7):
22:  Do not breathe dust 
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36/37/39:  Wear suitable protective clothing, gloves and eye/face protection 
WGK Germany: 3
RTECS: DD5775000
HS Code: 29339990
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