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Triclabendazole

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Name

Triclabendazole

EINECS 614-728-7
CAS No. 68786-66-3 Density 1.59 g/cm3
PSA 63.21000 LogP 6.03730
Solubility N/A Melting Point 175-176 °C
Formula C14H9Cl3N2OS Boiling Point 495.9 °C at 760 mmHg
Molecular Weight 359.663 Flash Point 253.7 °C
Transport Information N/A Appearance off-white solid
Safety 26-36 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 68786-66-3 (Triclabendazole) Hazard Symbols IrritantXi
Synonyms

Triclabendazol [INN-Spanish];6-chloro-5-(2,3-dichlorophenoxy)-2-methylsulfanyl-1H-benzoimidazole;Fasinex;Triclabendazolum [INN-Latin];CGA 89317;Triclabendazole [BAN:INN];1H-Benzimidazole,5-chloro-6-(2,3-dichlorophenoxy)- 2-(methylthio)-;5-Chloro-6-(2,3-dichlorophenoxy)-2-(methylthio)benzimidazole;

Article Data 7

Triclabendazole Synthetic route

68828-69-3

5-chloro-6-(2,3-dichlorophenoxy)-2,3-dihydro-1H-1,3-benzodiazole-2-thione

74-88-4

methyl iodide

68786-66-3

triclabendazole

Conditions
ConditionsYield
With potassium hydroxide In ethanol; water at 10 - 50℃; for 20h;94%
68828-69-3

6-chloro-5-(2,3-dichlorophenoxy)-1H-benzimidazole-2-thiol

77-78-1

dimethyl sulfate

68786-66-3

triclabendazole

Conditions
ConditionsYield
Stage #1: 6-chloro-5-(2,3-dichlorophenoxy)-1H-benzimidazole-2-thiol; dimethyl sulfate In methanol; water at 60℃; for 0.5h;
Stage #2: With sodium carbonate In water at 60℃; for 1.5h;
81.7%
616-38-6

carbonic acid dimethyl ester

68828-69-3

5-chloro-6-(2,3-dichlorophenoxy)-2,3-dihydro-1H-1,3-benzodiazole-2-thione

68786-66-3

triclabendazole

Conditions
ConditionsYield
With 1,8-diazabicyclo[5.4.0]undec-7-ene at 90 - 95℃; for 12h;79%
68828-69-3

5-chloro-6-(2,3-dichlorophenoxy)-2,3-dihydro-1H-1,3-benzodiazole-2-thione

74-88-4

methyl iodide

A

145770-89-4

6-chloro-5-(2,3-dichlorophenoxy)-1-methyl-2-methylthio-1H-benzimidazole

B

145770-88-3

5-chloro-6-(2,3-dichlorophenoxy)-1-methyl-2-methylthio-1H-benzimidazole

C

68786-66-3

triclabendazole

Conditions
ConditionsYield
With potassium carbonate In acetoneA 8%
B 8%
C 65%
139369-42-9

4-chloro-5-(2,3-dichlorophenoxy)-1,2-phenylenediamine

68786-66-3

triclabendazole

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: methanol / 6 h / Reflux
1.2: 4 h / 60 - 90 °C
2.1: methanol; water / 0.5 h / 60 °C
2.2: 1.5 h / 60 °C
View Scheme

triclabendazole hydrochloride

68786-66-3

triclabendazole

Conditions
ConditionsYield
With ammonia In water156 g
118353-04-1

4-chloro-5-(2,3-dichlorophenoxy)-2-nitroaniline

68786-66-3

triclabendazole

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: sodium hydroxide; hydrogen / methanol / 12 h / 100 °C / Inert atmosphere
2.1: methanol / 6 h / Reflux
2.2: 4 h / 60 - 90 °C
3.1: methanol; water / 0.5 h / 60 °C
3.2: 1.5 h / 60 °C
View Scheme
576-24-9

2,3-dichlorophenol

68786-66-3

triclabendazole

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: potassium carbonate / N,N-dimethyl-formamide / 12 h / 20 - 90 °C / Large scale
1.2: 4 h / 50 °C / Large scale
2.1: sodium hydroxide; hydrogen / methanol / 12 h / 100 °C / Inert atmosphere
3.1: methanol / 6 h / Reflux
3.2: 4 h / 60 - 90 °C
4.1: methanol; water / 0.5 h / 60 °C
4.2: 1.5 h / 60 °C
View Scheme
Multi-step reaction with 4 steps
1: potassium methanolate / N,N-dimethyl-formamide / 0.5 h / 155 °C / Microwave irradiation
2: sodium tetrahydroborate; palladium 10% on activated carbon / toluene / 2 h / Reflux
3: potassium hydroxide / ethanol / 21.5 h / 20 °C / Reflux
4: potassium hydroxide / ethanol; water / 20 h / 10 - 50 °C
View Scheme
5462-30-6

N-(4,5-dichloro-2-nitrophenyl)acetamide

68786-66-3

triclabendazole

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1.1: potassium carbonate / N,N-dimethyl-formamide / 12 h / 20 - 90 °C / Large scale
1.2: 4 h / 50 °C / Large scale
2.1: sodium hydroxide; hydrogen / methanol / 12 h / 100 °C / Inert atmosphere
3.1: methanol / 6 h / Reflux
3.2: 4 h / 60 - 90 °C
4.1: methanol; water / 0.5 h / 60 °C
4.2: 1.5 h / 60 °C
View Scheme

4-chloro-5-(2,3-dichlorophenoxy)-2-nitroaniline

68786-66-3

triclabendazole

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: sodium tetrahydroborate; palladium 10% on activated carbon / toluene / 2 h / Reflux
2: potassium hydroxide / ethanol / 21.5 h / 20 °C / Reflux
3: potassium hydroxide / ethanol; water / 20 h / 10 - 50 °C
View Scheme

Triclabendazole Chemical Properties

Molecular Structure:

Molecular Formula: C14H9Cl3N2OS
Molecular Weight: 359.6581
IUPAC Name: 6-Chloro-5-(2,3-dichlorophenoxy)-2-methylsulfanyl-1H-benzimidazole
Synonyms of Triclabendazole (CAS NO.68786-66-3): Triclabendazole [INN:BAN] ; 5-Chloro-6-(2,3-dichlorophenoxy)-2-(methylthio)-1H-benzimidazole ; 6-Chloro-5-(2,3-dichlorophenoxy)-2-methylthio-benzimidazole ; CCRIS 8988 ; CGA 89317 ; Fasinex ; Triclabendazol ; Triclabendazol [INN-Spanish] ; Triclabendazolum ; Triclabendazolum [INN-Latin] ; UNII-4784C8E03O ; 1H-Benzimidazole, 5-chloro-6-(2,3-dichlorophenoxy)-2-(methylthio)- ; 5-Chloro-6-(2,3-dichlorophenoxy)-2-(methylthio)benzimidazole
CAS NO: 68786-66-3
Classification Code: Agricultural Chemical ; Anthelmintics ; Anti-Infective Agents ; Antiparasitic Agents ; Drug / Therapeutic Agent ; Reproductive Effect ; Unspecified / Unclassified pesticide
Melting Point: 175-176°C 
Index of Refraction: 1.724
Molar Refractivity: 89.6 cm3
Molar Volume: 225.7 cm3
Surface Tension: 73.7 dyne/cm
Density: 1.59 g/cm3
Flash Point: 253.7 °C
Enthalpy of Vaporization: 76.35 kJ/mol
Boiling Point: 495.9 °C at 760 mmHg
Vapour Pressure: 5.68E-10 mmHg at 25°C

Triclabendazole Uses

 Triclabendazole (CAS NO.68786-66-3) is used as anthelmintic.

Triclabendazole Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral > 8gm/kg (8000mg/kg)   Medicamentos de Actualidad. Vol. 21, Pg. 227, 1985.
rabbit LD50 oral 206mg/kg (206mg/kg)   Medicamentos de Actualidad. Vol. 21, Pg. 227, 1985.
rat LC50 inhalation > 500mg/m3/4H (500mg/m3)   Medicamentos de Actualidad. Vol. 21, Pg. 227, 1985.
rat LD50 oral > 8gm/kg (8000mg/kg)   Medicamentos de Actualidad. Vol. 21, Pg. 227, 1985.
rat LD50 skin > 4gm/kg (4000mg/kg)   Medicamentos de Actualidad. Vol. 21, Pg. 227, 1985.

Triclabendazole Safety Profile

Safety Information of Triclabendazole (CAS NO.68786-66-3):
Hazard Codes:Xi
Risk Statements:36/37/38
36/37/38:Irritating to eyes, respiratory system and skin 
Safety Statements:26-36
26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36:Wear suitable protective clothing
Poison by ingestion. Experimental teratogenic effects. When heated to decomposition it emits toxic fumes of SOx, NOx, and Cl.

Triclabendazole Specification

Storage of Triclabendazole (CAS NO.68786-66-3): Store in original container in a cool dark place.

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