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Basic Information
| CAS No.: | 2818-66-8 |
|---|---|
| Name: | 5-Amino-2-benzimidazolethiol |
| Article Data: | 9 |
| Cas Database | |
| Molecular Structure: | |
|
|
|
| Formula: | C7H7N3S |
| Molecular Weight: | 165.219 |
| Synonyms: | 2-Benzimidazolethiol,5(or 6)-amino- (6CI,7CI);2-Benzimidazolethiol, 5-amino- (8CI);5-Amino-2-benzimidazolethiol;5-Amino-2-mercaptobenzimidazole;6-Amino-2-mercaptobenzimidazole;NSC 3984; |
| EINECS: | 220-574-8 |
| Density: | 1.48 g/cm3 |
| Melting Point: | 240-244 °C(lit.) |
| Boiling Point: | 356.8 °C at 760 mmHg |
| Flash Point: | 169.6 °C |
| Appearance: | off-white to light yellow crystalline powder |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-36 |
| PSA: | 93.50000 |
| LogP: | 2.01500 |
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Synthetic route
Conditions
| Conditions | Yield |
|---|---|
| With hydrogenchloride; iron In ethanol; water | 80% |
| With hydrogenchloride; iron In ethanol; water | 80% |
| Stage #1: 5-nitro-2-mercaptobenzimidazole With hydrogenchloride; zinc In methanol; water at 20℃; for 0.5 - 2h; Stage #2: With potassium carbonate In methanol; water for 1h; pH=9 - 10; Product distribution / selectivity; Heating / reflux; | 65% |
- 1146953-82-3
hexakis[(4-formyl-2-methoxy)phenoxy]cyclotriphosphazene
- 2818-66-8
5-amino-2-mercaptobenzimidazole
Conditions
| Conditions | Yield |
|---|---|
| In tetrahydrofuran at 20℃; for 24h; | 100% |
- 455-19-6
4-Trifluoromethylbenzaldehyde
- 68-11-1
mercaptoacetic acid
- 2818-66-8
5-amino-2-mercaptobenzimidazole
Conditions
| Conditions | Yield |
|---|---|
| With toluene-4-sulfonic acid In toluene for 24h; Reagent/catalyst; Solvent; Reflux; | 98% |
...Expand
- 2818-66-8
5-amino-2-mercaptobenzimidazole
Conditions
| Conditions | Yield |
|---|---|
| With acetic acid for 2h; Reflux; | 98% |
Conditions
| Conditions | Yield |
|---|---|
| With toluene-4-sulfonic acid In toluene for 24h; Reflux; | 96% |
...Expand
Conditions
| Conditions | Yield |
|---|---|
| With toluene-4-sulfonic acid In toluene for 24h; Reflux; | 93% |
...Expand
Conditions
| Conditions | Yield |
|---|---|
| With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; triethylamine In N,N-dimethyl-formamide for 4 - 10h; Reflux; Inert atmosphere; | 92% |
Conditions
| Conditions | Yield |
|---|---|
| With toluene-4-sulfonic acid In toluene for 24h; Reflux; | 91% |
...Expand
- 1443380-69-5
hexa(4-bromo-2-formylphenoxy)cyclotriphosphazene
- 2818-66-8
5-amino-2-mercaptobenzimidazole
Conditions
| Conditions | Yield |
|---|---|
| With formic acid In tetrahydrofuran at 20℃; for 24h; | 90.2% |
Conditions
| Conditions | Yield |
|---|---|
| In ethanol for 1h; Reflux; | 90% |
...Expand
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5-Amino-2-benzimidazolethiol
Chemistry
Molecular Formula: C7H7N3S 
Formula Weight: 165.22
mp : 240-244 °C(lit.)
Index of Refraction: 1.794
Flash Point: 169.6 °C
Boiling Point: 356.8 °C at 760 mmHg
Density of 5-Amino-2-benzimidazolethiol (2818-66-8): 1.48 g/cm3
Vapour Pressure: 2.85E-05 mmHg at 25°C
Physical State of 5-Amino-2-benzimidazolethiol (2818-66-8): Crystalline powder
Color of 5-Amino-2-benzimidazolethiol (2818-66-8): off-white to light yellow
Formula Weight: 165.22
mp : 240-244 °C(lit.)
Index of Refraction: 1.794
Flash Point: 169.6 °C
Boiling Point: 356.8 °C at 760 mmHg
Density of 5-Amino-2-benzimidazolethiol (2818-66-8): 1.48 g/cm3
Vapour Pressure: 2.85E-05 mmHg at 25°C
Physical State of 5-Amino-2-benzimidazolethiol (2818-66-8): Crystalline powder
Color of 5-Amino-2-benzimidazolethiol (2818-66-8): off-white to light yellow
Toxicity Data With Reference
Harmful by inhalation, in contact with skin and if swallowed.
LD50/LC50: Not available.
Carcinogenicity: 5-Amino-2-benzimidazolethiol (2818-66-8) - Not listed by ACGIH, IARC, or NTP.
LD50/LC50: Not available.
Carcinogenicity: 5-Amino-2-benzimidazolethiol (2818-66-8) - Not listed by ACGIH, IARC, or NTP.
Safety Profile
Safety: IRRITA
Hazard Codes : Xi (Irritant)
Risk Statements : 36/37/38 (Irritating to eyes, respiratory system and skin)
Safety Statements : 26-36 (In case of contact with eyes, rinse immediately with plenty of water and seek medical advice; Wear suitable protective clothing)
WGK Germany : 3
Hazard Codes : Xi (Irritant)
Risk Statements : 36/37/38 (Irritating to eyes, respiratory system and skin)
Safety Statements : 26-36 (In case of contact with eyes, rinse immediately with plenty of water and seek medical advice; Wear suitable protective clothing)
WGK Germany : 3
Specification
Storage: Store in a tightly closed container. Store in a cool, dry place.
Handling: Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Keep container tightly closed. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Use with adequate ventilation. Wash clothing before reuse.
Handling: Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Keep container tightly closed. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Use with adequate ventilation. Wash clothing before reuse.